Best 20 Leek Gratin Recipes

POTATO LEEK GRATIN

Steps:

• Heat oven to 350 degrees and butter a 2-quart gratin dish. Wash the leeks to remove any grit and slice thinly crosswise.
• Using a mandoline or sharp knife, slice the potatoes into rounds, 1/8-inch thick. Toss with 3/4 teaspoon salt and 1/4 teaspoon pepper. Layer the rounds in the gratin dish.
• Melt the 2 tablespoons butter in a large skillet over medium heat. Add leeks, remaining salt and pepper, and thyme. Cook, stirring, until leeks are tender and golden, 5 to 7 minutes. Discard thyme and scatter the leeks over the potatoes.
• Add cream, garlic and bay leaf to the skillet, scraping up browned bits of leeks from the bottom of the pan. Simmer gently for 5 minutes. Stir in nutmeg.
• Pour the cream over the leeks and potatoes and top with the Gruyère. Cover with aluminum foil and transfer to the oven. Bake for 40 minutes, uncover and bake until the cheese is bubbling and golden, 15 to 20 minutes longer. Let cool slightly before serving.

CREAMY POTATO AND LEEK GRATIN

Steps:

• Preheat oven to 400°F with rack in middle. Generously butter a 3-qt shallow baking dish. Cut a round of parchment paper to fit just inside a 12-inch heavy skillet, then set parchment aside.
• Halve leeks lengthwise, then cut crosswise into 1 1/2-inch pieces (you should have about 8 cups). Wash leeks.
• Cook leeks in butter with 1/2 tsp salt and 1/4 tsp pepper, covered with parchment round, in skillet over medium heat, stirring occasionally, until tender, 10 to 12 minutes.
• Meanwhile, peel potatoes and slice crosswise 1/16 inch thick with slicer. Transfer to a large heavy pot with cream, milk, thyme, 1 tsp salt, and 1/2 tsp pepper and bring to a boil over medium heat, stirring occasionally (liquid will thicken). Stir in leeks, then transfer to baking dish.
• Bake, uncovered, until potatoes are tender, 45 minutes to 1 hour. Let stand 10 minutes before serving.
• Do Ahead
• Gratin can be baked 2 days ahead and chilled. Let stand at room temperature 30 minutes, then reheat, covered, in a 350°F oven until hot, about 30 minutes.

MUSHROOM, LEEK, AND ZUCCHINI GRATIN

Steps:

• Preheat the oven to 375 degrees F (190 degrees C). Lightly grease a 3-quart casserole dish.
• Heat 2 tablespoons oil in a large, nonstick skillet over medium heat. Add leeks and onion to the hot skillet and saute for 10 minutes. Add mushrooms and continue to saute until leeks and onion are tender, 6 to 8 more minutes.
• Meanwhile, cut zucchini, yellow squash, and Roma tomatoes into 1/4-inch slices.
• Transfer mushroom mixture to the prepared casserole dish and spread evenly over the bottom. Layer zucchini, yellow squash, and tomatoes on top of the onion mixture.
• Combine bread crumbs, Parmesan cheese, parsley, cashews, tarragon, salt, and pepper in a large mixing bowl. Sprinkle over the vegetables to cover.
• Bake in the preheated oven until gratin is dark brown all over, about 1 hour.

VEGAN POTATO LEEK GRATIN

Steps:

• Combine leeks, margarine, garlic, 2 teaspoons oregano, 2 teaspoons rosemary, salt, and pepper in a large saucepan over medium heat. Cook until leeks are soft, 7 to 8 minutes. Add potatoes, coconut milk, almond milk, and flour and bring to a simmer. Cover and simmer until potatoes are almost cooked, 10 to 15 minutes. Add more liquid if mixture starts to stick.
• Preheat the oven to 400 degrees F (200 degrees C). Grease a casserole dish.
• Spoon potato mixture into the prepared casserole dish and sprinkle with shredded cheese. Garnish with remaining oregano and rosemary.
• Bake in the preheated oven until potatoes are fully cooked and the top is golden brown, 20 to 30 minutes.

CAULIFLOWER AND LEEK GRATIN

Steps:

• Preheat oven to 350 degrees. Butter a shallow 2-quart baking dish and set aside.
• Bring a large pot of salted water to a boil. Add cauliflower and cook until slightly tender, 2 to 3 minutes. Drain and rinse under cold water; transfer to a large bowl and set aside.
• Melt butter in a small saucepan over medium-low heat. Add leeks, shallots, red-pepper flakes, and thyme; cook, stirring, until softened, about 5 minutes. Stir in flour until well combined. Slowly add milk, stirring constantly, until well combined. Increase heat to medium-high and bring to a boil; let boil 2 to 3 minutes until thickened. Remove from heat and stir in 3/4 cups cheese; season with salt and pepper.
• Pour leek mixture over cauliflower mixture and stir until cauliflower is well coated; transfer to prepared baking dish. Sprinkle remaining 3/4 cup cheese over top. Transfer to oven and bake until bubbly, about 25 minutes.
• Meanwhile, preheat broiler. Transfer baking dish to broiler; broil until golden brown, 5 to 8 minutes. Let cool 5 to 10 minutes before serving.

POTATO AND LEEK GRATIN

Steps:

• Preheat oven to 400 degrees.
• Fill a large bowl with water. Peel potatoes and add them to water as you peel, to prevent discoloration.
• Melt butter in a medium saucepan over medium heat. Add leeks and cook, stirring, until soft, 3 to 5 minutes. Add cream, milk, and nutmeg; cook until bubbles form around the edge. Remove from heat.
• Meanwhile, slice potatoes 1/8-inch thick. Place in even layers in a large shallow baking dish; season with salt and pepper. Pour leek-cream mixture over potatoes; sprinkle with cheese.
• Transfer to oven and bake until potatoes are fork-tender and top is brown and bubbling, about 55 minutes. Remove from oven and let cool about 10 minutes before serving.

LEEK GRATIN

Steps:

• Preheat oven to 375 degrees. Halve leeks lengthwise, leaving halves attached at root, and rinse well, shaking off water.
• In a large skillet, combine cream and leeks; season with salt and pepper. Bring to a boil over medium-high; reduce to a medium simmer, cover, and cook 5 minutes. Uncover and simmer until leeks are tender, 15 minutes. Transfer leeks and sauce to a shallow 2-quart baking dish.
• Sprinkle with cheese and bake until golden and bubbling, about 35 minutes. Let gratin rest 10 minutes before serving.

COD, LEEK & POTATO GRATIN

Steps:

• Preheat the oven to 375°.
• Butter a 13-inch oval gratin pan or 4 deep, individual-sized baking dishes.
• Cut the potatoes crosswise into thin, uniform slices.
• Cut the leeks crosswise into slices about twice as thick as the potatoes.
• Season the fish lightly with salt and pepper.
• Arrange half of the potato slices in the prepared dish, overlapping them to cover the bottom.
• Season lightly with salt and pepper.
• Scatter half of the leeks over the potatoes, then arrange the fish slices over the leeks in a single layer, overlapping the slices as necessary.
• Top with the remaining leeks, then with the remaining potatoes.
• Season with salt and pepper.
• Pour the cream evenly over the layers; bake for 40 minutes.
• Remove from the oven and spoon some of the cooking liquid over the top of the gratin to moisten the potatoes and help them brown.
• Continue to bake until the top layer of potatoes is tender when pierced with a sharp knife, about 20 minutes.
• Let stand for 10-15 minutes and serve.

APPLE, LEEK, AND BUTTERNUT SQUASH GRATIN

Steps:

• Preheat the oven to 350 degrees. In a 10-inch skillet, heat 2 tablespoons of oil over medium heat. Add leeks and 2 tablespoons water; season with salt and pepper. Cook, stirring occasionally, until they begin to brown, about 10 minutes. Add sherry and sage and cook until liquid is reduced to a glaze, about 3 minutes; set aside.
• In a 2-quart shallow baking dish, arrange squash in overlapping layers; season with salt and pepper. Spread leeks evenly over the squash.
• Arrange apples in an overlapping layer over the leeks. Brush apples with remaining tablespoon oil. Cover tightly with aluminum foil. Bake 45 minutes.
• Uncover and sprinkle cheese over the top. Raise the oven temperature to 450 degrees and bake 10 minutes, or until the cheese has melted and is golden brown. The tip of a paring knife should easily pierce the gratin. Let cool 10 minutes before serving. Garnish with sage leaves.

SPINACH AND LEEK GRATIN WITH ROQUEFORT CRUMB TOPPING

Steps:

• Preheat oven to 400°F. Melt 3 tablespoons butter in medium skillet over medium-high heat. Mix in 2 tablespoons mustard, then breadcrumbs. Sauté until breadcrumbs are golden, about 5 minutes. Cool briefly. Mix in cheese.
• Toss 1 1/2 bags spinach in large nonstick pot over high heat until wilted, about 3 minutes. Transfer to sieve set over bowl. Repeat with remaining spinach. Press on spinach to drain.
• Melt remaining 2 tablespoons butter in same pot over medium-high heat. Add leek; sauté 4 minutes. Add cream, remaining 1 1/2 tablespoons mustard, and spinach. Toss until thick and blended, about 2 minutes. Season with salt and pepper. Transfer to 7x11-inch baking dish. Top with breadcrumb mixture. Bake until bubbling, about 10 minutes.

POTATO, LEEK, GRUYèRE AND OYSTER MUSHROOM GRATIN

Steps:

• Melt 2 tablespoons butter in heavy large skillet over medium-high heat. Add mushrooms and sauté until almost tender, about 5 minutes. Add garlic and sauté until mushrooms are tender and golden, about 3 minutes longer. Transfer mushroom mixture to bowl. Melt remaining 2 tablespoons butter in same skillet over medium-high heat. Add leeks and thyme and sauté until leeks are tender and beginning to brown, about 8 minutes. Add leek mixture to bowl with mushrooms. (Can be made 1 day ahead. Cover and refrigerate.)
• Preheat oven to 400°F. Butter 13 x 9 x 2-inch baking dish. Whisk broth, cream, wine, 1 teaspoon salt and 1/2 teaspoon pepper in large bowl to blend. Layer 1/3 of potatoes on bottom of prepared dish. Top with half of mushroom-leek mixture, then 3/4 cup cheese. Top with half of remaining potatoes. Pour half of cream mixture over. Top with remaining mushroom-leek mixture and 3/4 cup cheese. Cover with remaining potatoes. Pour remaining cream mixture over; sprinkle with remaining cheese.
• Bake gratin uncovered until potatoes are tender and sauce bubbles thickly, about 1 hour 20 minutes. Let gratin stand 30 minutes before serving.

ARTICHOKE, LEEK, AND POTATO GRATIN

Steps:

• Preheat oven to 425°F. Butter 9- by 13-inch glass baking dish or 14-inch oval gratin dish.
• In medium saucepan over moderately high heat, combine leeks, 1/2 teaspoon kosher salt, and 2/3 cup water. Cover, bring to boil, then reduce heat and simmer, stirring occasionally, until tender, about 8 minutes. Drain, transfer leeks to medium bowl, and let cool.
• Using food processor slicing disk or mandoline, thinly slice potatoes, then transfer to large bowl and add cold water to cover. Stir with hands to rinse, drain well, and repeat. Layer potatoes between paper towels and pat dry.
• Add Swiss cheese, artichokes, pepper, and remaining 1 1/2 teaspoons kosher salt to leeks and toss well.
• Layer 1/3 of potatoes in bottom of prepared dish, overlapping slightly. Evenly spoon 1/2 of leek-cheese mixture over top. Top with second layer of potatoes, then remaining leek-cheese mixture, then final layer of potatoes. Slowly pour half-and-half over top. Cover snugly with foil.
• Bake 40 minutes. Remove foil, sprinkle Parmesan cheese over top, and bake until top is golden and potatoes are easily pierced with small knife, about 20 minutes more. Serve warm.

HONEYNUT SQUASH, LEEK, AND BRIE GRATIN

Steps:

• Preheat oven to 425 degrees; butter a 10-inch, 1 1/2-quart gratin dish. In a skillet, cook 2 tablespoons butter, leeks, and a pinch of salt over medium-high heat, stirring, until soft, 8 minutes. Add vermouth; cook until mostly evaporated, 1 to 2 minutes. In another pan, melt remaining butter. Toss with panko; season with salt and pepper.
• Scatter half of pasta, leeks, squash, and cheese in gratin dish. Season with salt and pepper; repeat with remaining half of each. Pour broth and cream evenly over top; cover with parchment-lined foil and bake until squash is tender, 25 minutes. Sprinkle panko mixture over gratin. Bake, uncovered, until golden and bubbly, 20 to 25 minutes. Let cool 10 minutes; serve with greens.

MUSHROOM AND LEEK GRATIN

Steps:

• Preheat oven to 375 degrees. In a large skillet, heat 2 tablespoons oil over medium-high. Working in batches if necessary, add mushrooms and cook, tossing occasionally, until softened, 10 to 15 minutes. Transfer to a paper-towel-lined plate.
• Wipe out skillet, return to heat, and add 2 tablespoons oil. Add leeks and season with salt and pepper. Cook, stirring frequently, until softened, 8 minutes. Add wine, and cook until almost evaporated, 2 to 3 minutes. Stir in cream, lemon juice, and thyme leaves.
• Transfer leek mixture to a 2-quart baking dish. Top with mushroom slices, overlapping slightly. Sprinkle with Parmesan and bake until edges are bubbling, 20 to 25 minutes. Serve warm.

CASHEW CAULIFLOWER AND LEEK GRATIN

Steps:

• Preheat oven to 425°. Place cauliflower florets and leek slices in a parchment-lined 15x10x1-in. baking pan. Drizzle with oil. Sprinkle with paprika, salt and pepper; toss to mix. Roast 20 minutes, stirring halfway through., Meanwhile, process cashew milk, white wine, cashew butter and garlic in a blender until smooth. Pour into a small saucepan; bring to a boil, stirring constantly. Reduce heat; simmer until thickened, 2-3 minutes., Transfer roasted cauliflower and leeks to a greased 11x7-in. baking dish; stir in cashew sauce. Return to oven; bake until heated through, 5-7 minutes. Sprinkle with cashews and chives.

LEEK AND MUSHROOM GRATIN

Steps:

• Preheat oven to 350. Lightly grease/spray a 2-qt casserole dish.
• In a large skillet, melt butter. Add leeks and mushrooms, and salt, pepper and paprika cover and saute for 10-12 minutes; Remove from heat.
• Add light cream, parmesan cheese and swiss cheese. Stir to combine well; pour into prepared casserole dish. Sprinkle breadcrumbs on top.
• Bake at 350 for 20-25 minutes.

LEEK AND MUSHROOM GRATIN

Steps:

• Melt 2 tablespoons butter in a small saucepan over low heat, then cool.
• Toss melted butter with bread crumbs, cheeses, garlic, parsley, 1/4 teaspoon salt, and 1/8 teaspoon pepper in a bowl until combined.
• Trim each leek to an 8-inch length (reserve tops for another use if desired). Halve leeks lengthwise, then cut crosswise into roughly 1-inch pieces. Wash leeks, then drain well.
• Melt 1 tablespoon butter in a 1-to 1 1/2-quart heavy saucepan over medium heat. Add flour and cook roux, whisking, 1 minute. Add stock in a slow stream, whisking, then bring to a boil, whisking. Add nutmeg and zest and boil, whisking, 1 minute. Remove from heat.
• Preheat oven to 400°F. Butter baking dish.
• Melt 1 tablespoon butter in a 12-inch heavy skillet over medium-low heat. Add leeks and 1/4 teaspoon each of salt and pepper, then cover leeks directly with a round of parchment paper and cook, stirring occasionally, until liquid is absorbed and leeks are tender and just beginning to brown, 10 to 15 minutes.
• Meanwhile, heat remaining 2 tablespoons butter in a large heavy skillet over medium heat until foam subsides. Add mushrooms and 1/4 teaspoon each of salt and pepper and cook, stirring occasionally, until liquid is absorbed and mushrooms are just beginning to brown, about 15 minutes. Remove from heat.
• Remove parchment from leeks and stir in mushrooms. Transfer mixture to baking dish, spreading it evenly. Pour sauce over vegetables and top with crumb mixture. Bake until gratin is bubbling and topping is golden, about 15 minutes.

LEEK, POTATO, AND MOREL GRATIN

Steps:

• Preheat oven to 375 degrees. Generously butter a 2 1/2-quart baking dish. Bring cream, broth, morels, and green garlic to a simmer.
• Assemble the gratin: Peel potatoes, and cut crosswise into slices slightly thicker than 1/8 inch. Layer potatoes in dish, overlapping slightly. Spread half the leeks over top, and season with salt. Pour half the cream mixture over top. Repeat.
• Cover gratin with foil, and bake 40 minutes. Uncover, and bake until potatoes are tender and golden and most of the liquid is absorbed, 20 to 25 minutes more. Let cool 15 minutes. Before serving, sprinkle with lemon zest.

CRUSTED FRESH HERBED RACK OF LAMB WITH POTATO LEEK GRATIN AND ROASTED GARLIC SAUCE

Steps:

• For the Gratin: Preheat the oven to 350 degrees F.
• Slice the potatoes into 1/4-inch slices. Slice the leeks into thin circles. Mix the butter and the garlic together and set aside. Season the cream with salt, white pepper, and nutmeg. Layer the potatoes, the leeks, the garlic butter, and then the cream, alternating until the potatoes are lightly covered with the cream. Bake for 30 minutes.
• For the Lamb: Sear the lamb in olive oil in a roasting pan until golden, fat side down first. Remove and allow to rest for 5 minutes. Brush the mustard onto both sides of the seared lamb. Season with salt and pepper. Mix together all of the herbs. Dredge both sides of the lamb in the herbs, pressing lightly so the herbs adhere. In the same roasting pan the lamb was cooked in, add the 20 cloves of garlic and place the lamb on top. Cook in the oven for 15 minutes or until medium-rare. When cooked remove the lamb from the roasting pan and wrap in aluminum foil to rest.
• Place the roasting pan on top of the stove over medium heat. Remove the garlic and set aside. Discard all the fat. Add the thyme, white wine, and the stock and reduce by half.
• Place half of the roasted garlic in a blender. Add the reduced stock and wine mixture and puree until smooth. Add the tablespoon of butter and pulse to incorporate. Season with salt and pepper.
• To Serve: Place a large scoop of the gratin in the center of a plate. Slice the lamb every two chops and place on top of the gratin. Pour the sauce over the lamb and garnish with the remaining roasted garlic and your favorite seasonal vegetables.

CABBAGE AND LEEK GRATIN

Steps:

• 1. Preheat the oven to 180*C/375*F. Remove any old and tatty looking leaves from the outside of your head of cabbage. Cut it into quarters and remove the core. Shred coarsely.
• 2. Trim the leeks, cut in half and wash them thoroughly. Shred them coarsely as well. Mix them into the cabbage.
• 3. Bring a large pot of lightly salted water to the boil. Add the vegetables. Bring back to the boil, and then reduce the heat to a simmer and cook them for about 5 to 6 minutes, just until barely tender. Drain in a colander. Make sure you get as much water out as you can. You don't want any to dilute the delicious cream sauce.
• 4. Make your cream sauce by melting the 3 TBS of butter in a saucepan. Stir in the flour and cook, stirring over medium heat, for about one minute. Slowly whisk in the milk and cook, whisking constantly, until smooth and nicely thickened. Season to taste with some salt, pepper and grated nutmeg. Add a splash of hot pepper sauce to taste.
• 5. Put the cabbage mixture into a buttered shallow dish. Pour the cream sauce over top and allow it to soak in for a few minutes, while you make the crumbs for on top
• 6. Melt the 2 TBS of butter and then stir in the bread crumbs, mixing all together well. Sprinkle the buttered crumbs evenly over the top of the casserole. Bake in the preheated oven for 25 to 30 minutes, until nicely bubbling and the crumbs are lightly browned on top. Note - I sometimes add a cup of grated gruyere cheese, plus 1 heaping TBS of grated Parmesan cheese to the sauce to give it a rich and cheesy flavour. You may also add some grated cheese on top if you wish.