Prepare the Pastry:
Preheat your oven to 400°F (200°C). Line a baking sheet with parchment paper.
Roll out the thawed puff pastry sheets on a lightly floured surface to smooth out the lines. Cut into 4×4 inch squares.

Shape the Pastries:
Fold each corner of the pastry square towards the center to create a diamond shape. Press gently to seal.

Make the Filling:
In a small bowl, mix the cream cheese, sugar, and vanilla extract until smooth.

Assemble the Pastries:
Spoon about 1 teaspoon of the cream cheese mixture into the center of each pastry, followed by a tablespoon of the cherry preserves.

Egg Wash:
Beat the egg with a tablespoon of water to make an egg wash. Brush the edges of the pastries with the egg wash to give them a golden color.

Bake:
Place the pastries on the prepared baking sheet, spaced evenly. Bake for 15-20 minutes or until golden brown and puffy.

Garnish:
Remove from the oven and let cool slightly. Garnish with fresh rosemary or mint if desired.