Take 2 cups of all purpose flour.
Take freezer cold butter.
Add freezer cold butter to flour.
Mix butter to flour and add ice cold water as needed and collect the dough together.
Keep the pastry dough in freeze for 15 minutes.
Take the pastry dough out and roll into square sheet and spread freezer cold butter on to dough sheet.
Fold the butter pastry sheet into 3 parts and fold it over and make a envelope shape.
Roll the pastry sheet into rectangle shape.
Fold the rectangle shape pastry sheet into 3 folds and keep it in freeze for 15 to 30 minutes.
Wrap the folded pastry sheet with cling wrap and keep it in freeze for 15 to 30 minutes.
Take the pastry sheet out and roll it out again and fold it again and keep it in freeze, repeat roll and fold pastry sheet process 6 times.
After roll and fold pastry for 6 times, finally take the pastry dough out from freeze and roll it out into 18 inches long and cut into 8 equal square sheets.
Take one square sheet and make 3 small incisions cuts.
Take the square pastry sheet and fill it with apple filling.
Pull the incision part over the apple filling and close the pastry square sheet.
Take one fork, deep it into dry flour and make the design on the edges of the apple turnover pastry.
Take one bowl, crack the egg and add 1 tablespoon of water and bit the egg and make it to watery consistency. Apply egg wash to all apple turnovers.
Preheat the oven at 350 degree Fahrenheit. Put the apple turnover in the oven and bake it for 30 minutes.
Take the apple turnovers from oven and keep it on cooling wire rack.