Step 1: Preheat your oven to 400°F (200°C) to allow your puff pastry to rise perfectly.
Step 2: On a lightly floured surface, roll out the thawed puff pastry sheets if needed and cut into squares, about 4x4 inches.
Step 3: In a mixing bowl, combine cream cheese, granulated sugar, egg yolk, vanilla extract, and lemon zest. Blend until smooth and creamy.
Step 4: Place a spoonful of the cream cheese mixture in the center of each pastry square and top with fresh berries. Fold corners to create a pocket.
Step 5: In a small bowl, whisk together the egg and water for the egg wash. Brush the tops of the danishes with the egg wash.
Step 6: Bake the danishes on a parchment-lined baking sheet for 15-20 minutes until golden brown and flaky.
Step 7: While baking, whisk together powdered sugar, lemon zest, and lemon juice until smooth.
Step 8: Drizzle the glaze over the baked danishes and serve warm.