2 lb. hamburger
1/2 onion, chopped
1/2 tsp. vinegar
1/2 c. ketchup
1 tsp. chili powder
1 tsp. prepared mustard
1 can tomato soup
1 tbsp. sugar
1 tbsp. Worcestershire sauce
hamburger buns

Brown hamburger and onion together. Add salt and pepper to taste. Add remaining ingredients and simmer for 15 minutes.