Preheat your oven to 400°F (200°C) and line a baking sheet with parchment paper.
On a lightly floured surface, roll out the thawed puff pastry and slice it into four equal rectangles. Arrange on the baking sheet.
In a mixing bowl, combine the softened cream cheese, powdered sugar, and vanilla extract, blending until smooth. Spoon the mixture into the center of each pastry rectangle.
In a separate bowl, mix the sliced strawberries with lemon juice, granulated sugar, and cornstarch. Spoon this mixture over the cream cheese filling on each pastry.
Fold the edges of the puff pastry over the filling to form a border and pinch the corners together.
Apply the beaten egg along the edges of the pastries with a pastry brush.
Bake for 20-25 minutes until the pastries are puffed and golden brown.
Allow to cool slightly, then mix milk with powdered sugar to create a glaze and drizzle over the danishes.
Dust with additional powdered sugar before serving.
Notes
Serve on a beautiful platter, garnished with fresh strawberry slices and a sprig of mint.