Macaroni And Cheese Dinner
["1 pkg. Kraft macaroni and cheese", "2 1/4 c. hot water", "1/2 tsp. dry mustard", "4 oz. sour cream"]
["Mix water and mustard in a 1 1/2-quart casserole dish.", "Whisk in cheese from pouch.", "Add macaroni.", "Cover with a tight-fitting lid.", "Bake 30 minutes.", "Stir in sour cream."]
["macaroni", "water", "dry mustard", "sour cream"]