Preheat oven to 400° F.
Split muffins. Brush each muffin with melted margarine. Top each half with about 6 slices of apple. Brush with butter and sprinkle 3 tsp brown sugar and dash of apple pie spice on each muffin slice.
Bake for 15 minutes. Put cheese slice on for the last 3 minutes of baking.Servings: 12 muffins