01 - Preheat oven to 400°F and line a baking tray with parchment paper.
02 - In a bowl, blend cream cheese, granulated sugar, vanilla extract, and lemon zest until smooth and creamy. Set aside.
03 - In a separate bowl, toss diced strawberries with granulated sugar, lemon juice, and cornstarch. Set aside.
04 - Roll out puff pastry sheet and cut into 8 squares. Lightly score a narrow border on each square, taking care not to cut through completely.
05 - Spread 1 tablespoon cream cheese mixture in the center of each square, staying inside the border.
06 - Spoon 1 tablespoon strawberry mixture over the cream cheese layer on each square.
07 - Brush the pastry borders with the beaten egg and milk mixture to promote golden color.
08 - Bake for 18 to 22 minutes or until pastry is puffed and golden brown.
09 - Transfer pastries to a wire rack and cool slightly before glazing.
10 - For the glaze, whisk together powdered sugar, milk, and vanilla extract until smooth. Drizzle over pastries once cooled, if desired.