Preheat the oven to 400 degrees F (200 degrees C) and line a baking sheet with parchment paper.
Beat cream cheese, sugar, vanilla, lemon juice, and salt together in a bowl until smooth and creamy.
Roll out puff pastry slightly and cut into 6 equal rectangles. Transfer to the prepared baking sheet. Using a knife, lightly score a smaller rectangle inside each piece (do not cut all the way through). Prick throughout the center with a fork.
Pipe or spoon the cream cheese filling into the center of each pastry in a thick oval or log shape, staying within the scored area. Brush the edges of the pastry with egg wash.
Bake in the preheated oven until the pastry is golden brown and puffed, 15 to 18 minutes. Let cool for 5 to 10 minutes.
For icing whisk powdkered sugar, milk, and vanilla together until smooth. Drizzle over cooled Danishes. Serve with strawberry jam on the side or spooned alongside for dipping. Enjoy!
