Sloppy Joes
["2 lb. hamburger", "1 medium onion, chopped", "1 Tbsp. mustard", "1 can chicken gumbo soup", "1/2 c. catsup", "1 c. water", "1 (3 oz.) can mushrooms (bits and pieces), drained"]
["Brown hamburger and onion.", "Drain off grease.", "Add remaining ingredients and simmer until desired thickness."]
["hamburger", "onion", "mustard", "chicken gumbo soup", "catsup", "water", "mushrooms"]