Steak N' Mushroom Casserole
["1 1/2 lb. round steak, cut in serving pieces", "1/4 c. all-purpose flour", "1 tsp. salt", "1/4 c. butter", "1 large onion, diced", "1 can cream of mushroom soup", "1 soup can milk", "6 oz. sliced mushrooms"]
["Flour meat and season with salt and pepper.", "Brown in butter. Place meat in casserole dish. Cook onions until tender but not brown; add soup, milk and mushrooms.", "Heat to boiling.", "Pour over steak.", "Bake, covered, at 325\u00b0 for 1 hour and 30 minutes or until tender."]
["all-purpose", "salt", "butter", "onion", "cream of mushroom soup", "milk", "mushrooms"]