Creating this delectable strudel is straightforward and enjoyable. Follow these simple steps to bake your own Flaky Breakfast Strudel with Apple Filling:

1. Preheat your oven to 400°F (200°C). A hot oven ensures the pastry becomes beautifully golden and flaky.
2. In a bowl, mix the diced apples with brown sugar, cinnamon, lemon juice, and raisins (if using). This mixture will be your strudel filling, bursting with flavors and aromas.
3. Roll out the puff pastry on a floured surface to prevent sticking. Cut it into a rectangle that will accommodate your filling nicely.
4. Place the apple filling down the center of the pastry. Ensure the filling is evenly distributed to achieve a consistent flavor throughout the strudel.
5. Fold the pastry over the filling and press the edges to seal. This step is crucial to keep the filling enclosed during baking.
6. Brush the pastry with a beaten egg for a golden, glossy finish. This not only enhances the appearance but also adds a slight richness to the crust.
7. Carefully transfer the strudel onto a baking sheet and bake for 25-30 minutes until golden brown and flaky.
8. Allow the strudel to cool slightly, then dust with powdered sugar for a final touch of sweetness and visual appeal.