Barbecue Sauce - cooking recipe

Ingredients

3/4 c. vinegar
1/2 c. barbecue sauce (any kind)
1 small onion
1 Tbsp. mayonnaise
3/4 to 1 c. sugar
1 small bottle ketchup (14 oz.)
1 Tbsp. mustard

Preparation

Chop
onion and combine all ingredients.
Bring to boil and then simmer at least one hour.
(Great with hamburgers.)