1. Preheat Oven: Set your oven to 400°F and line a baking sheet with parchment paper.

2. Mix Cream Cheese Filling: In a medium bowl, beat together the softened cream cheese, granulated sugar, lemon juice, vanilla extract, and egg yolk until smooth and creamy.

3. Prepare Puff Pastry: Unfold the thawed puff pastry sheets onto a lightly floured surface. Cut each sheet into 4 squares (for a total of 8 squares). Place them on the prepared baking sheet. Lightly score a half-inch border around each square and prick the centers with a fork.

4. Fill Pastries: Spoon about 1 tablespoon of the cream cheese mixture into the center of each pastry square. Top with a spoonful of fruit jam.

5. Add Egg Wash: Brush the pastry borders with the beaten egg. Optionally, sprinkle the edges with coarse sugar for a sparkling, caramelized crunch.

6. Bake: Bake for 15–18 minutes, or until the pastries are puffed and golden brown. Let them cool on the baking sheet for about five minutes.

7. Glaze: In a small bowl, mix powdered sugar, 2 tablespoon of milk, and a splash of vanilla extract until smooth. Drizzle the glaze over the cooled pastries.

8. Serve: Enjoy these delightful homemade breakfast Danish pastries warm or at room temperature.