• Preheat oven to 400° and line a baking sheet(s) with parchment paper. Set aside.

For the Apple Filling

• In a medium saucepan over low heat, bring water, cornstarch, sugar, cinnamon and lemon juice to a boil, stirring constantly.
• Continue stirring for 3-4 minutes until the sauce thickens up.
• Once the sauce has thickened, add apples, stir and let simmer for 8-10 minutes.

For the Cream Cheese Mixture

• In a medium mixing bowl, beat cream cheese until fluffy, about 2-3 minutes.
• Add sugar, egg yolk, vanilla, lemon juice and beat for an additional 2 minutes.

For the Egg Wash

• In a small bowl, whisk egg and water together until combined. Set aside.

Making the Pastries

• On a lightly floured surface, roll out seams of pastry dough and cut dough in half lengthwise. Then cut each strip into three equal pieces (for a total of 6 pastries per sheet.
• Fold each of the 12 sheets into a triangle. Make a cut about ½ inch from the two sides but do not cut all the way to the tip of the triangle.
• Unfold each triangle and fold one side over to the other side and the other side back over to the opposite side.
• Add a spoonful of cream cheese mixture and a spoonful of apple filling into the center of each pastry.
• Place on the prepared baking sheet. Brush edges of pastry with egg wash, sprinkle with sugar, if desired, and bake for 12-14 minutes or until golden.

For the Glaze Drizzle

• In a small bowl, mix powdered sugar, milk and vanilla together until combined.
• Drizzle over pastries once cool.