1 lb. ground beef
1 med. onion
1 tsp. salt
1/4 tsp. pepper
1 (10 3/4 oz.) can chicken gumbo soup, undiluted
1 tbsp. prepared mustard
1 1/2 tbsp. catsup
8 hamburger buns

Combine meat, onion, salt and pepper in skillet. Cook until meat is lightly browned. Drain off drippings. Stir in soup, catsup and mustard. Simmer 15 minutes. Serve on buns.