Apple Puff Pastry Pastries

Prep the Apples (2 minutes):
Preheat your oven to 200°C (400°F).Wash and core the apples. Peel if desired, then thinly slice them for even cooking.
Sauté the Apples (3 minutes):
In a pan over medium heat, melt the butter. Add the sliced apples and sugar, cooking for 2-3 minutes until slightly softened.
Sprinkle with cinnamon and cook for an additional minute.
Assemble and Style (3 minutes):
Unfold the thawed puff pastry sheet and cut it into squares or desired shapes.
Place a spoonful of the apple filling in the center of each pastry square.
Glaze and Bake (15-20 minutes):
In a small bowl, whisk together the egg yolk and milk for the egg wash. Brush the edges of the pastry squares with this mixture.
Fold the pastry squares into triangles or other shapes, sealing the edges with a fork. Brush the tops with the egg wash and sprinkle with sliced almonds.
Transfer to a baking sheet lined with parchment paper and bake for 15-20 minutes, or until golden brown and puffed.
Serve and Enjoy:
Let the pastries cool slightly before serving. Dust with powdered sugar if desired.