Prep the Pastry: Preheat oven to 400°F. Unfold thawed pastry on a floured surface. Cut out shapes using a 3-inch heart cutter. Score an inner border on each heart with a smaller cutter, being careful not to cut all the way through.
Egg Wash: Whisk the egg and water together. Brush the outer borders of the pastry hearts lightly with the egg wash.
Make Filling: Beat the softened cream cheese, granulated sugar, and vanilla extract until completely smooth.
Assemble: Spoon a dollop of the cream cheese mixture inside the scored border of each heart. Top with a spoonful of strawberry preserves.
Bake: Bake for 15-18 minutes until the edges are puffed and deeply golden brown. Cool slightly and dust with powdered sugar before serving.
