cover with clear plastic wrap or waxed paper. Micro-cook on 100% power for 3 minutes. Turn patties over, rotate the baking dish a half turn. Micro-cook, loosely covered, on 100% power for 2 to 3 minutes more or until meat is done. Drain off fat. Serve the patties on toasted buns with lettuce and tomato. Dollop with additional sour cream, if desired.