Appelflappen (Turtă de mere olandeze)

Directions

1. 1Preheat the oven to 350 degrees Fahrenheit.
2. 2Peel and core the apples. Then cut them into small cubes and place them into a bowl.
3. 3Add 2 tablespoons of sugar (keep 1 tablespoon aside) and the cinnamon to the apples and mix until well combined.
4. 4Unfold the puff pastry sheets, sprinkle with a tiny bit of flour, then flatten them with a rolling pin to remove the precut lines. Try to keep a square shape when flattening. Repeat with the second sheet.
5. 5Cut the pastry sheets in four squares each. Divide the cut apples over the sheets (place it on half of the sheet in a triangle shape) and fold diagonally.
6. 6Cut the edges of the puff pastry evenly if necessary and close them by pushing down with a fork on the edges.
7. 7Whisk the egg in a small bowl until smooth. Brush the egg over each appelflap and sprinkle the remaining sugar over them.
8. 8Bake the appelflappen in the oven for about 25 minutes, or until golden brown.
9. 9When they are done, place them on a baking rack to cool off for at least 15 minutes.