Preheat your oven to 375°F (190°C) and line a baking sheet with parchment paper.
Roll out the thawed puff pastry sheets on a lightly floured surface. Cut each sheet into rectangles, about 4 inches by 5 inches. You should get about 8 rectangles total.
In a mixing bowl, beat the softened cream cheese with the powdered sugar and vanilla extract until smooth and creamy.
Add the diced strawberries and lemon juice into the cream cheese mixture; gently fold until the strawberries are well incorporated.
Place a generous spoonful of the cream cheese-strawberry mixture in the center of each puff pastry rectangle.
To shape the danishes, fold the corners of each rectangle towards the center, pinching the edges to seal slightly (you can also leave it open for a more rustic look).
Brush the edges of the pastries with the beaten egg for a golden finish.
Bake in the preheated oven for 20-25 minutes, or until the pastries are puffed and golden brown.
Allow the danishes to cool slightly before serving. Dust with additional powdered sugar if desired.
Notes
Dust with additional powdered sugar before serving for extra sweetness.