Sloppy Joes

2 lbs ground beef
1/2 small onion
1/4 cup worcestershire sauce
1/4 cup sugar
2 T vinegar
1 can tomato soup
Ketchup
Salt and Pepper

Brown hamburger with onion. Add next 4 ingredients, then add ketchup, salt, and pepper to taste. Serve with toasted hamburger buns.