In a mixing bowl, combine flour, sugar, and salt. Cut in cold butter until mixture resembles coarse crumbs.

Gradually add cold water, mixing until dough forms. Shape into a disk, wrap in plastic, and refrigerate for 30 minutes.

In a bowl, beat together cream cheese, sugar, and vanilla until smooth.

Preheat oven to 375°F (190°C). Roll out the dough on a floured surface to 1/8 inch thick.

Cut into squares and place a spoonful of filling in the center of each square. Fold corners to the center and pinch to seal.

Place on a baking sheet lined with parchment paper. Brush with beaten egg.

Bake for 20-25 minutes or until golden brown. In a small saucepan, heat fruit preserves and water until smooth. Brush over warm pastries.