1 1/2 lb. ground beef
1 med. onion, diced
3/4 c. ketchup
1 tbsp. Worcestershire sauce
2 tbsp. vinegar
3 tbsp. brown sugar
1 1/2 tsp. dry mustard
1 tsp. celery seed
Dash of pepper
1/2 tsp. salt

Brown meat and diced onion. Drain off fat and add rest of ingredients. Simmer about 15 minutes until well blended. Serve on hamburger buns.