11/2 pounds lamb (leg, loin, or shoulder), boneless, cut in 11/2-inch cubes 1/2 cup vegetable oil 1  tablespoon lemon juice 2  teaspoons sugar 1/2 teaspoon salt 1/2 teaspoon paprika 1/4 teaspoon dry mustard 1/8 teaspoon ground black pepper 1/4 teaspoon Worcestershire sauce 1  clove garlic, cut in halves 6  small whole cooked potatoes 6  small [...]