Preheat the oven to 200 degrees.
Roll out the pastry to the shape of your baking tray. I used a pizza tray.
Make sure you put the pastry on greaseproof paper as it will help later for moving the galette of the baking tray later.
Peel and core the apples and spread over the pastry leaving a rim.
Using a pastry brush, brush the edges of the rim and pull up and overlap to make a little wall to hold the apples in.
Add the blackberries on top of the apples and sprinkle with all the wonderful spices. Use the egg wash again on the exposed pastry round the edges.
Bake for 25-30 minutes until golden brown and serve straight away with custard or ice cream.