Thaw the pastry sheet as per the instructions on the box. Make sure that the sheet is just thawed enough to work and is not very soggy.
Pre heat the oven to 400 F and prepare a baking sheet by lining it with parchment.
In a bowl, combine the softened cream cheese, sugar and vanilla and mix it up well until they are creamy.
Lay the pastry sheet on the work surface and cut them into 9 squares.
Fold it over edge to edge, working with one square at a time,so it forms a triangle.
Having the wide side towards you, make a cut on both the sides to form a V-shape. Do not cut it all the way through and make sure that they are still attached.
Open the square and rotate it 90 degrees. Take the top flap and fold it over itself towards the bottom. Now take the top flap and fold it over to the top.
Add a tablespoon of cream cheese filling in the middle space and top it with the sliced strawberry.
Use a spatula and transfer the prepared pastry to the baking sheet.
Bake for 15 to 20 minutes, or until they are golden brown. Dust with powdered sugar (optional) and serve the strawberry cream cheese pastry.