Preheat oven to 350 degrees F In a mixing bowl, whisk together the milk, eggs, sugar, vanilla, nutmeg and cinnamon. Stir in the baking powder. In a baking dish coated with non-stick cooking spray, add the oats and apples. Pour the milk mixture over the oats and stir just until combined. Top with raisins and brown sugar. Baked 35 – 40 minutes.