Preheat oven to 375°. Spray muffin tin or line with paper liners and set aside.Combine oats, brown sugar, dried fruit, walnuts, and baking powder in a medium bowl. Stir.Combine milk, applesauce, butter, and egg in a separate bowl and stir.Add milk mixture to oat mixture. Stir until combined.Using a 2-ounce trigger release ice-cream scoop, add oatmeal to the muffin tin. Bake for 25-30 minutes or until edges begin to brown.Allow to cool for 10 minutes before removing, using an offset spatula to loosen. Serve or store covered in the refrigerator for up to a week. Heat for 1-2 minutes in the microwave.