Sloppy Joes - cooking recipe

Ingredients

2 lb. lean ground beef
3/4 c. chopped onion
2 cans Campbell's chicken gumbo soup
1/3 c. ketchup
1 Tbsp. yellow prepared mustard

Preparation

Brown meat; remove fat.
Add onion and cook until onion is transparent.
Add remaining ingredients.
Simmer, uncovered, for 45 minutes or until thick, stirring occasionally.
Serve on hamburger buns with a slice of American cheese and a slice of sweet onion.