Roast Leg of Lamb 1 whole leg of lamb - about 8 pounds salt & pepper to taste 2/3 cup prepared yellow mustard dash of Worcestershire sauce 3 or 4 cloves fresh garlic - grated Directions and preperations: Place the lamb in an open roasting pan. Sprinkle with a generous amount of salt and pepper. Combine the mustard, Worcestershire sauce and garlic. Spread the mixture over the lamb. Roast, uncovered, at 325º for about 20 minutes per pound.