2 lb. hamburger
1 med. onion
1 sm. bottle ketchup
1 tbsp. mustard
1 tbsp. vinegar
4 tbsp. sugar
1/2 c. water
1 tsp. salt
1/4 tsp. pepper
1/4 tsp. paprika
Chili powder (pinch) or to taste

Fry hamburger and onions together. Drain. Add other ingredients, simmer covered 15 minutes. Serve on hamburger buns.