Macaroni And Cheese Casserole
["8 oz. elbow macaroni, cooked and drained", "1 small onion, chopped", "1 can cream of mushroom soup", "2 (12 oz.) pkg. grated cheese", "1 c. mayonnaise", "3 Tbsp. butter, melted", "1 c. Ritz cracker crumbs"]
["Preheat oven to 350\u00b0.", "In casserole dish, combine all ingredients, except butter and crackers.", "Mix crackers and butter until well blended.", "Sprinkle over top of macaroni mixture and bake until cheese is melted."]
["elbow macaroni", "onion", "cream of mushroom soup", "grated cheese", "mayonnaise", "butter", "cracker crumbs"]