Preparing the Pastry

• Prepare the Compote: In a medium saucepan, combine the blueberries, sugar, lemon juice, and cornstarch over medium heat. Stir gently until thickened and the berries begin to burst. Allow this delightful mixture to cool completely.
• Mix the Filling: In a mixing bowl, beat together the softened cream cheese, sugar, vanilla extract, and egg yolk until smooth and creamy. This will create a luscious, rich filling.
• Roll the Pastry: Lightly flour your work surface and roll out the thawed puff pastry. Cut it into squares or rectangles, depending on your desired size for the pastries.
• Assemble the Pastries: Spread a generous spoonful of the cream cheese filling onto the center of each pastry piece, then top it with the cooled blueberry compote.
• Seal the Edges: Fold each pastry over and use a fork to seal the edges tightly, ensuring all flavors stay inside during baking.
• Egg Wash: Brush the tops of the sealed pastries with the beaten egg for that beautiful glossy finish.
• Bake to Perfection: Preheat your oven to 400°F (200°C) and bake the pastries for 15-18 minutes or until beautifully puffed and golden brown.
• Cool and Dust: Once baked, let the pastries cool slightly on a wire rack. Just before serving, dust them with powdered sugar for an extra touch of sweetness.