My mom made this for us when we were growing up. Since she grew up in Rapid City, these were called Steamburgers. Or you could call them Maid Rites or Sloppy Joes. Whatever you call them, they are good.
2 lb. ground beef
1 T dried onion
1 can chicken gumbo soup (I have been buying the Light Chicken Gumbo Soup and haven't noticed a difference at all) (This is found in with the soup, along with Cream of Chicken, etc.)
2 T mustard
2 T Worcestershire sauce
1/2 c. ketchup
1/2 c. brown sugar
Brown burger with onion, salt and pepper. Drain if greasy. Add remaining ingredients & simmer covered 10-15 minutes (or until hot throughout) stirring occasionally.
This also works great in the crockpot.