In a small bowl, combine first 3 ingredients. With pastry blender, cut in cold margarine until mixture resembles coarse crumbs. Set aside for topping.
Stir together flour, baking powder, cinnamon, nutmeg and salt. Set aside.
In large mixing bowl, combine cereal, milk, brown sugar, and applesauce. Let stand about 4 minutes or until cereal softens. Add egg whites, oil, vanilla and raisins. Beat well. Add flour mixture, stirring only until combined.
Portion batter evenly into twelve 2 1/2-inch greased muffin pan tins. Sprinkle each muffin with topping. Bake at 400 degrees for about 20 minutes or until golden brown. Serve warm. Makes 12 muffins.