Sloppy Joes

1 pound ground beef
1/2 large onion, diced
1/2 bell pepper, diced (optional)
2 Tablespoons ketchup
1 Tablespoon mustard
1 can chicken gumbo soup

 Begin browning ground beef. When it begins to brown, add onion (and pepper, if using) and cook together with ground beef until both are cooked through. Add additional ingredients and cook until heated through. Serve on hamburger or slider buns.