1/4 Cup minced onion
1 Cup white vinegar
1 Cup tomato sauce
1/4 Cup worcestershire sauce
2 Teaspoons sugar
1 Teaspoon salt
1/2 Teaspoon fresh ground black pepper
1/8 Teaspoon cayenne
Dash tabasco sauce
In a saucepan, melt the butter over medium heat. Add the onions and saute for 6 to 8 minutes, or until the onions begin to turn golden. Stir in the remaining ingredients, reduce the heat to low, and cook until the mixture thickens, approximately 20 minutes. Stir frequently.