This recipe is from an Anonymous Griller.

1 teaspoon rosemary
1 (4-5 lb) boned leg of lamb flattened to 1-1/2" thickness

Marinade...
1/2 cup olive oil
1/2 cup vegetable oil
1 cup dry red wine
1 teaspoon dried mint leaves
1 teaspoon monosodium glutamate
1/2 teaspoon salt
1/4 teaspoon pepper

Combine all ingredients; mix well. Rub rosemary well into surface of meat on both sides. Place lamb in shallow glass dish. Pour marinade over lamb; chill 2 hours. Place lamb flat on preheated gas grill, fat side up. Grill, using medium setting 17 - 20 minutes on each side, brushing occasionally with Marinade. Yield: 8 to 10 servings.