Cook apples, butter, sugar and cinnamon over medium heat 6–8 minutes until tender.

Mix cornstarch and water; stir into apples. Cook 1 minute until thick; cool.

Heat oven to 375°F. Line a baking sheet. Roll each crust into a 12-inch square; cut each into sixteen 3-inch squares.

Put 1 tablespoon filling on 16 squares. Add remaining squares; crimp edges with a fork and cut a small vent.

Brush with beaten egg. Bake 20–25 minutes until golden; cool on a rack.