DIRECTIONS
In a large bowl, combine the beef and water chestnuts. Shape into six patties. Place in a 13-in. x 9-in. dish.
In a small bowl, combine the soy sauce, sherry or broth, onions, brown sugar, garlic and ginger. Pour 1/2 cup over patties; cover and refrigerate for 2-3 hours or overnight. Cover and refrigerate remaining marinade for basting.
Coat grill rack with cooking spray before starting the grill. Drain and discard marinade. Grill patties, covered, over medium heat for 5-7 minutes on each side or until meat is no longer pink, basting occasionally with reserved marinade. Serve on lettuce-lined buns. Yield: 6 servings.