Tuna Fish Casserole
["1 can tuna fish, drained", "1 medium onion, chopped", "1 bag plain potato chips", "1 can cream of mushroom soup", "1/2 can milk"]
["Crunch up half the bag of chips.", "Mix with tuna fish and onion.", "In separate bowl, mix soup and milk.", "Pour soup mixture over tuna mixture.", "Bake at 375\u00b0 for 45 minutes to 1 hour."]
["tuna fish", "onion", "potato chips", "cream of mushroom soup", "milk"]