Directions:

Set oven to control at broil and/or 550 F. Place top of steak 3 to 4 inches from heat. Broil until medium, about 15 minutes per side; cool. Cut steak into 3/8-inch strips. Arrange in baking dish, 13 1/2x9x2 inches. Layer mushroom over meat; top with pepper rings. Combine vinegar, oil and seasonings; pour over meat and vegetables. Cover; refrigerate at least 3 hours, spooning marinade over vegetables occasionally. With a slotted spoon, remove vegetables to lettuce cups. Arrange strips of meat beside vegetables; garnish with tomatoes.