2 1/2 lb ground beef; lean
1 lg onion, peeled and quartered
1 c ketchup
1 ts chili powder
1 ts dry mustard
1/2 ts salt
2 c beef broth or water
8 Hamburger buns, toasted
1. In a skillet, brown and crumble ground beef; drain well.
2. Place beef and remaining ingredients except hamburger rolls in a crockpot. Cover and cook on LOW 6 to 12 hours.
3. Taste for seasoning before serving and correct if necessary. Spoon over toasted hamburger buns.