This came from Lucinda Scala Quinn's "Mad Hungry." The paste turns out very lemon-y, especially after using the food processor. It worked for me since I like lemon with lamb, but you could cut back if you like, especially if using a smaller boneless leg. I think the paste would be good with a little bit of Dijon mustard. Also, we grilled the lamb instead of using the oven.
Roast Leg of Lamb With Lemon, Garlic and Rosemary
Lucinda Scala Quinn: "The longer the lamb marinates in the seasoning paste, the better flavor you'll have. Anywhere from 1 to 24 hours will work, but overnight is best. Slice the leftovers for pita stuffed sandwiches topped with tabbouleh."
2 whole lemons, washed, seeded, and chopped
2 sprigs of fresh rosemary, leaves removed
5 to 6 garlic cloves, peeled
1 tablespoon coarse salt
1/2 teaspoon freshly ground black pepper
2 to 4 tablespoons extra-virgin olive oil
1 boneless leg of lamb, butterflied, boned, and cut to lay flat (about 5 pounds)
~Place the chopped lemon, rosemary, garlic, salt, pepper, and olive oil in a food processor. A blender can also be used, if done in batches. If you have neither, finely chop all ingredients together.
~Open up the lamb and lay it flat. Spread and massage the lemon paste evenly over the inside and outside of the lamb. Place in a baking dish and cover, or in a large resealable plastic bag. Refrigerate overnight to marinate, turning occasionally.
~Preheat the oven to 450. Remove the meat from the refrigerator 30 to 60 minutes before cooking. Place the lamb on a rack in a foil-lined roasting pan or rimmed baking sheet. Place the meat in the oven and after 5 minutes, reduce the temperature to 425. Roast for 45 minutes, or until medium rare, 140 on an instant read thermometer. Allow the meat to rest for 10 to 15 minutes before carving and serving.