Make Ahead Chicken Casserole
["1 lb. box Creamettes macaroni, cooked", "4 c. cooked chicken, diced", "1 small onion, diced", "1 jar sliced mushrooms", "2 c. shredded cheese", "2 c. milk", "1 c. celery soup or chicken soup, undiluted", "1/2 tsp. salt", "hunk butter"]
["Cook macaroni; drain.", "Cool.", "Put in baking dish.", "Add other ingredients.", "Cover and refrigerate overnight. Let stand out of refrigerator 30 minutes."]
["macaroni", "chicken", "onion", "mushrooms", "shredded cheese", "milk", "celery soup", "salt", "hunk butter"]