Preheat oven to 180°C (160°C Fan) and line a baking tray with greaseproof paper.
Make sure you take your pastry out of the fridge 20 minutes before unrolling it.
Put the apples, lemon juice, brown sugar and cinnamon in a saucepan on a low/medium heat. Mix thoroughly and remove from the heat once the apples are soft.
Drain the apples to remove the extra liquid (so not to have a soggy bottom).
Roll out the pastry and using a large cookie cutter (or homemade stencil) cut out 8 pumpkin shapes.
Place 4 of the pumpkin shapes onto the baking tray and divide the apple filling between the 4 pumpkins.
With the remaining pumpkin shapes, cut out Jack O' Lantern faces. Make them as creative or simple as you like!
Lay each Jack O' Lantern face over the top of the pie filling and press down the edges with a fork.
Beat the egg in a small bowl and using a pastry brush, brush the top of the pastries. This will give the pastry a golden brown colour in the oven.
Sprinkle over the granulated sugar and cinnamon to flavour the pastry.
Bake for 15-25 minutes until the pastry is a golden brown colour and the bottom of the pies are cooked.
Leave to cool on a wire wrack and then enjoy!