ZUCCHINI, TOMATO, AND LAMB LASAGNA

Steps:

• Preheat oven to 425 degrees. Brush two rimmed baking sheets with oil. Divide zucchini between sheets; arrange in a single layer, turning once to coat. Season with salt and pepper; roast until softened, 15 minutes.
• Meanwhile, in a large skillet, heat oil over medium-high. Add onion and cook until softened, 8 minutes. Add garlic and cook until fragrant, 30 seconds. Add lamb and cook, breaking up meat with a spoon, until browned, 6 minutes. With a slotted spoon, transfer lamb to paper towels to drain and pour off fat from skillet. Return lamb to skillet; add tomato paste, tomatoes, and oregano. Stir to combine. Cook until tomato liquid is almost evaporated, 10 minutes. Season with salt and pepper.
• Reduce oven to 400 degrees. Spoon half the lamb mixture into an 8-inch square baking dish. Top with half the zucchini slices, overlapping to fit. Repeat layering with remaining lamb mixture and zucchini. Spread ricotta over top; sprinkle with Parmesan. Bake until sauce is bubbling and cheese is browned in spots, 20 to 30 minutes. Let cool 10 minutes before serving.