Roll out ⅔ of your pastry until it is large enough to fill a deep pie dish.
Peel and core the apples and cut into 1.5 inch cubes.
Place the apple into a large bowl along with the blackberries and spices then mix together.
Mix the sugar and cornflour and sprinkle over the base of the pie.
Tip the fruit into the pie dish.
Roll out the remaining pastry and cut into strips long enough to cover the top of the pie in a lattice pattern.
Brush with plant milk.
Bake in the centre of your oven for 45 minutes or until the pastry is crisp and golden.
Notes
This pie can be frozen before cooking. If cooking from frozen, bake at gas mark 4 for 45 minutes before turning the heat up to gas mark 5 and cooking for a further 20 minutes.