Make the pastry by putting the flour and salt into a bowl.
Add the Stork with butter and rub in until the mixture resembles fine breadcrumbs.
Mix the water with the egg and add to the pastry.
Mix with a knife until it comes together and then use your hand to knead it into a dough.
Roll into a sausage shape, wrap in cling film and leave to cool in the fridge for an hour.
Make the filling by mixing the ingredients together until they are well combined
Preheat the oven to 200C, 180C fan, Gas Mark 4
Take the pastry from the fridge and cut into four discs.
Roll each disc out until it is about 18 cm circle in diameter
Place the filling mixture on one half of the circle leaving a 2cm gap round the edge
Fold the other half of the pastry over the top and crimp the edges together
Glaze with the egg mixture and bake for 30 minutes