1 lb. ground beef
1 onion, chopped
1 c. ketchup
2 tbsp. vinegar
2 tbsp. brown sugar
1 tbsp. vinegar
3 tbsp. Worcestershire sauce
1/2 c. water
1 tsp. mustard

Brown meat and onion. Combine all other ingredients and add to meat. Simmer for 1/2 hour. Serve on hamburger buns.