Place a funnel or small dish in the middle of a deep pie dish and set aside.
Melt the butter in a large saucepan over a medium heat, then add the apples and sugar.
Toss over the heat until the sugar has dissolved and the apples are just starting to soften.
Sprinkle the cinnamon over and mix together. Spoon the mixture into the dish around the funnel.
Roll out the pastry and gently place over the top of the apples, allowing some pastry to hang over the edge.
Place in the fridge and chill for 30mins.
Preheat the oven to 200°c / gas 6.
Glaze the pie with the milk and sprinkle some sugar over the top. Place in the preheated oven for approx 30mins until the pastry is pale and golden.
Serve with either custard or vanilla ice cream.
