2 lbs. ground beef
1 c. ketchup
3 tbsp. mustard
1 tbsp. vinegar
1 tsp. Worcestershire sauce
3 tbsp. brown sugar
1/2 c. chopped onion
1/2 chopped celery

Brown ground beef and onion. Add remaining ingredients and let simmer on low for 3/4 hour. Serve on hamburger rolls.