01 - Preheat oven to 400°F. Line a baking sheet with parchment paper.
02 - Mix cream cheese, sugar, vanilla extract, and lemon zest in a bowl until smooth and creamy.
03 - Toss sliced strawberries with sugar and lemon juice in a separate bowl. Set aside to macerate.
04 - Roll out puff pastry on a lightly floured surface. Cut into 8 equal squares.
05 - Place squares on prepared baking sheet. Score a smaller square inside each, being careful not to cut through the dough.
06 - Spoon about 1 tablespoon of cream cheese filling into the center of each square, spreading gently within the scored area.
07 - Arrange strawberry slices over the cream cheese filling.
08 - Whisk together egg and milk in a small bowl. Brush pastry edges lightly with the mixture.
09 - Bake for 18-20 minutes until golden brown and puffed.
10 - Let cool slightly. For the glaze, mix powdered sugar, milk, and vanilla extract until smooth, then drizzle over cooled danishes if desired.