Si and Dave served up the perfect apple pie on Saturday Kitchen.

The ingredients for the filling are: 5oz golden caster sugar, plus 1 tbsp for sprinkling, 1 tsp ground cinnamon, 2 tbsp cornflour and 600g Bramley cooking apples, peeled, cored, sliced.

For the pastry: 400g plain flour, plus extra rolling, 2 tbsp caster sugar, 1 lemon, zest only, 250g cold butter, cut into cubes and 1 free-range egg, beaten with 2 tbsp cold water, plus 1 free-range egg, beaten, to glaze.