Memphis Style Sauce

1 cup Tomato Sauce
1 cup Vinegar
5 tbs. Worcestershire Sauce
1 tbs. Butter
1/2 carton Onion -- chopped
1 dash Black Pepper
1 dash Cayenne Pepper
1 1/2 tsp. Salt
1/2 cup

Mix all ingredients together in a large sauce pan, bring to a quick boil, reduce heat, and let simmer for 10 minutes.