1 lb. ground beef
1/2 c. chopped onion
1/4 c. chopped green pepper
1/4 c. chopped celery
1 (8 oz.) can tomato sauce
1/4 c. ketchup
1 tbsp. vinegar
1 1/2 tsp. Worcestershire sauce
1 tsp. salt
1/8 tsp. pepper

Brown meat. Add vegetables. Cook until tender. Add remaining ingredients; mix well. Cover and simmer 20 minutes. Spoon mixture onto hamburger buns. Serves 6.