1
Place a layer of paper towels on a large baking sheet. Arrange the apple slices evenly on top. Cover with another layer of paper towels and leave aside.
2
To make the pastry, combine butter and golden caster sugar (leave some for dusting later) in a large bowl until lightly mixed. Add a whole egg and a yolk (set aside the white for later). Beat the mixture for about 1 minute until it resembles a slightly scrambled egg.
3
Add plain flour and mix in a third at a time until it starts to clump, then use your hands to gather it together. Shape the dough into a ball.
4
Cover the dough with cling film and refrigerate for 45 minutes.
5
Combine the golden caster sugar, cinnamon, and plain flour for the filling in a bowl that is large enough to fit the apples later.
6
Once the pastry has been chilled, preheat the oven to 190°C.
7
Gently whisk the egg white set aside in step 2 using a fork.
8
Set aside one third of the pastry, keeping it wrapped, while rolling out the remaining pastry to line a baking dish roughly 20-30cm wide and 4cm deep, ensuring there is a slight overhang.
9
Shape the remaining third into a top for your pie ensuring it is larger than the base of your dish.
10
Place the now dried apples in the bowl with the cinnamon and sugar mixture. Gently mix with your hands and promptly transfer the mixture into the pastry-lined dish, stacking it high.
11
Apply a small amount of water along the edges of the pastry, then place the pastry lid over the apples, pressing the edges together firmly to seal. Use a sharp knife to trim any excess pastry and make five small cuts on the top of the lid to allow steam to escape.
12
Brush the top of your pie with the egg white and dust with golden caster sugar.
13
Bake for 40 minutes or until golden brown.
14
Remove from oven and allow to cool for 5-10 minutes.