PORK LOIN WITH GRAPES

Steps:

• Tie the pork loin with kitchen twine at 1-inch intervals. In a shallow dish large enough to hold the pork, whisk together the chopped herbs, mustard, 2 tablespoons of the olive oil, teaspoon salt and teaspoon pepper. Add the pork and coat with the marinade. Cover and refrigerate for at least 4 hours.
• One hour before cooking, bring the pork to room temperature. Scrape off and reserve the marinade, then season the meat with salt and pepper.
• Place a roasting pan in the oven and heat the oven to 325 degrees. Place a large saute pan over high heat. Add 2 more tablespoons of the oil and heat until smoking. Add the pork and sear about 4 minutes on each side, until well browned. Transfer fat side down to the roasting pan. Set the saute pan aside. Rub the reserved marinade over the pork and top with half the butter and the herb sprigs. Place the pan in the oven and set the timer for 15 minutes.
• Meanwhile, in a large bowl, toss the potatoes, shallots and grapes with the remaining 2 tablespoons oil and season with salt and pepper. After the pork has cooked for 15 minutes, place the potatoes cut side down around the pork. Lay the grapes and shallots over the potatoes. Cook for an hour more, or until the center of the pork reaches 125 degrees.
• Meanwhile, drain the sauté pan of fat and return to medium-high heat. When hot, add the port and bring to a boil, scraping the bottom of the pan. When nearly evaporated, add the chicken stock and return to a boil. Whisk in the remaining butter and season with salt and pepper. Strain through a fine-meshed sieve set over a serving bowl. Cover and keep warm.
• When the pork is done, transfer to a cutting board. Cover lightly with foil and let rest at least 10 minutes before slicing. Serve on a platter over the grapes, potatoes and shallots, accompanied by the sauce.