Poor Man'S Steak
["3 lb. hamburger", "1 c. milk", "1 c. bread crumbs", "3 tsp. salt", "1 medium onion, chopped", "1 can mushroom soup or 1 pkg. gravy mix"]
["Combine all ingredients except soup or gravy mix.", "Press into 9 x 13-inch pan.", "Refrigerate overnight.", "Cut into serving slices and brown in skillet.", "Place into baking dish.", "Pour soup over mixture and bake covered for 1 hour at 350\u00b0."]
["hamburger", "milk", "bread crumbs", "salt", "onion", "mushroom soup"]