For the filling:
575g Bramley apple
(3 medium apples), peeled, cored and sliced to 1 cm thick (see tip)
2 tbsp golden caster sugar
For the crumble
175g plain flour
110g golden caster sugar
110g cold butter
For the topping (optional)
1 tbsp rolled oats
1 tbsp demerara sugar
double cream, clotted...