Melt butter in saucepan. Saute ... until thickened. Add cheese; stir until melted. Add macaroni and canned tomatoes. Pour into a greased 2 quart baking dish. Slice tomato and arrange on top. Sprinkle cheese over surface. Bake at 375 degrees for 30-35 minutes. Makes 6 servings.
Ingredients: 12 (cheese .. flour .. milk .. mustard .. onion .. paprika ...)