Barbecued Burgers - cooking recipe

Ingredients

2 medium onions, chopped
6 Tbsp. catsup
2 Tbsp. vinegar
1 tsp. chili powder
1 tsp. sugar
2 Tbsp. butter
1 1/2 tsp. mustard
1 lb. ground beef

Preparation

Saute onion and meat.
Combine other ingredients and heat. Serve on hot buns.