4 1/2 pounds Ground beef

1 1/2 cups Onion -- chopped

2 1/4 cups Catsup

3 tablespoons Prepared mustard

3 tablespoons Worcestershire sauce

2 tablespoons Vinegar

2 tablespoons Sugar

1 tablespoon Salt

1 tablespoon Pepper

18 Hamburger buns -- split

Recipe by: Sue Klapper In a Dutch oven, cook beef and onion until meat is browned and onion is tender; drain. Combine catsup, mustard, worcestershire, vinegar, sugar, salt and pepper; stir into beef mixture. Heat through. Serve on buns.