1 lg. flank steak
2 lg. tomatoes, quartered
1 green pepper, sliced into thin rings
1 lg. Bermuda onion, sliced into thin rings
1 (4 oz.) can whole button mushrooms, drained
2 tbsp. (1/4 stick) butter, cut into pieces
3 tbsp. chili sauce
1 tbsp. Worcestershire sauce

Preheat oven to 350 degrees. Place steak in shallow pan. Cover with tomatoes, green pepper, onion and mushrooms and dot with butter. Combine remaining ingredients and pour over top. Bake uncovered until tender, about 45 minutes. Thinly slice across grain to serve.