BARBEQUED HAMBURGER

2 med. onions, chopped
2 tbsp. vinegar
2 tbsp. Worcestershire sauce
1/2 tsp. salt
1/2 tsp. red pepper
3/4 c. catsup
1 tsp. chili powder
3/4 c. water
2 tbsp. butter or bacon fat
1 1/2 lbs. hamburger

Mix first 9 ingredients together. In a frying pan, brown the meat, add the first mixture. Cover and simmer 20 minutes. Serve over mashed potatoes, hamburger buns as sloppy joes.