Creating your own Blackberry Cheese Pastry is simple if you follow these easy steps:

1. Preheat Oven: Preheat your oven to 400°F (200°C). Line a baking sheet with parchment paper.
2. Prepare Puff Pastry: Roll out the puff pastry on a lightly floured surface. Cut into squares (about 3-4 inches each).
3. Make Cheese Filling: In a bowl, combine softened cream cheese, granulated sugar, vanilla extract, and lemon juice. Mix until smooth and creamy.
4. Assemble the Pastry: Place a tablespoon of the cheese mixture in the center of each pastry square. Top with a few blackberries.
5. Seal the Pastry: Fold the edges of the pastry over the filling, pinching to seal well. You can cut slits on top for ventilation if desired.
6. Apply Egg Wash: Brush the tops of each pastry with the beaten egg for a golden color.
7. Bake: Place on the prepared baking sheet and bake for 25-30 minutes or until the pastries are golden brown.
8. Cool Down: Remove from the oven and let them cool for 10-15 minutes on a wire rack.
9. Dust with Powdered Sugar: If desired, dust the pastries with powdered sugar for an elegant finish.

By following these steps, you will create amazing Blackberry Cheese Pastry that will leave everyone asking for more.