Preheat the oven to 180℃.

Peel apples and cut into medium sized pieces. Add to a large pan/pot (not heated yet).

Add the small splash of water. Turn the heat to a low-medium.

Let the apples start to simmer for about 10 minutes. Stir occasionally.

Once the apples have softened. Add the cinnamon to the apple, along with a couple tablespoons of brown sugar, and a pinch of salt. Mix and ensure all pieces of apple are covered.

Turn the heat of the pot/pan to a medium-high temperature and let the apples caramelise slightly.

Once the apples are nice and caramelised, add them to an oven safe dish, spread so that it is evenly laid out.

Place a layer of the puff pastry on top of the caramelised spiced apples. Push down lightly so the edges are covered and stuck to the side of the dish.

In a small bowl, crack in the egg and add the milk. Whisk until combined. Use a brush to cover the pastry in the egg wash.

Place the apple pie in the oven for 25 minutes, or until the pastry is golden in colour.