3/4 cup yellow mustard 

3/4 cup red wine vinegar

1/4 cup sugar

1 1/2 tablespoons butter

2 teaspoons salt

1/2 teaspoon Worcestershire sauce

1 1/4 teaspoons ground black pepper

1/2 teaspoon Tabasco sauce

In a medium saucepan, combine ingredients, stirring to blend. Over low heat, simmer 30 minutes.  Let stand at room temperature 1 hour before using.