Creating Bratapfel is a straightforward process. Follow these simple steps:

1. Preheat the Oven: Preheat your oven to 350°F (175°C).
2. Prepare the Apples: Wash and core the apples, creating a hollow space for the filling. Be careful not to cut through the bottom.
3. Make the Filling: In a mixing bowl, combine the chopped walnuts or pecans, raisins, brown sugar, cinnamon, and nutmeg. Mix well until combined.
4. Stuff the Apples: Generously fill each apple with the nut and raisin mixture, pressing down gently to pack it in.
5. Add Butter: Place a small dollop of softened butter on top of the filling in each apple.
6. Prepare Baking Dish: Arrange the stuffed apples upright in a baking dish. Pour the water into the bottom of the dish to help create steam while baking.
7. Bake the Apples: Cover the dish with aluminum foil and bake in the preheated oven for 20 minutes. Remove the foil and bake for an additional 10-15 minutes, or until the apples are tender and slightly caramelized.
8. Cool Slightly: Once baked, remove the apples from the oven and let them cool for a few minutes before serving.

These steps will guide you in creating this incredible dessert with ease.