01 - Preheat oven to 400°F and line a baking tray with parchment paper.
02 - In a small bowl, blend cream cheese, granulated sugar, vanilla extract, and lemon zest until smooth and creamy.
03 - In another bowl, combine diced strawberries with granulated sugar, lemon juice, and cornstarch. Toss until evenly coated.
04 - Roll out thawed puff pastry and cut into 8 equal squares. Score a 1/2-inch border around each square without cutting through.
05 - Spoon 1 tablespoon of cream cheese filling into the center of each pastry square and spread gently within the border.
06 - Place 1 tablespoon of strawberry mixture over the cream cheese layer on each pastry.
07 - Brush the pastry borders lightly with beaten egg mixed with milk.
08 - Transfer tray to the oven and bake for 18 to 22 minutes, until pastry is puffed and golden brown.
09 - Allow pastries to cool slightly on a wire rack before glazing.
10 - Whisk powdered sugar, milk, and vanilla extract until smooth. Drizzle glaze over cooled pastries if desired.