1 lb. ground beef
1 (8 oz.) can tomato sauce
2 tbsp. chili sauce
2 tbsp. vinegar
1 tbsp. Worcestershire sauce
3 tbsp. water
1 tbsp. chopped onion
1 tsp. prepared mustard

Brown ground beef. Add remaining ingredients; mix well. Simmer 15 minutes. Serve on warm hamburger buns.