Hamburger Barbecue - cooking recipe

Ingredients

1 lb. hamburger
1 Tbsp. vinegar
2 Tbsp. sugar
1/2 tsp. salt
onion if desired
1 Tbsp. butter
1 Tbsp. prepared mustard
1/2 c. catsup
1/2 tsp. pepper

Preparation

Mix above ingredients in a saucepan and cook slowly for at least 30 minutes.