ASDA part of the Wal-Mart family

• 275g plain flour, plus extra for rolling out
• 2tbsp icing sugar
• pinch of salt
• 175g butter, chilled
• 1 egg, separated
• 1 Bramley apple, peeled, cored and sliced
• 1 Granny Smith apple, peeled, cored and sliced
• 300g blackberries
• 50g granulated sugar, plus extra to sprinkle
• 2tbsp cornflour

1 Preheat the oven to 200C/180C Fan/Gas 6. Sift the flour, icing sugar and salt into a large bowl. Cut the butter into small cubes, add to the flour mixture and rub in with your fingertips. Add the egg yolk and tablespoons chilled water and mix to a stiff dough – you may need to add a few more drops of water.

2 Gently mix apples, blackberries, sugar and cornflour together, taking care not to damage the berries.

3 Divide the pastry into two. Roll out each piece into a round, slightly larger than a 23cm ovenproof plate or foil plate. Line the plate with one round of pastry. Fill with the fruit mixture, leaving a 2cm gap around the edge. Brush pastry edge with egg white, then cover with the other piece of pastry, pressing edges firmly together.

4 Brush the top with egg white and make four slits in the centre to allow steam to escape. Put the pie on a baking tray with a rim, to prevent any juice leaking on to the oven. Bake for 15 minutes, then reduce oven temperature to 180C/160C Fan/Gas 4 and cook for another 20 minutes. Sprinkle with sugar before serving.