750²µ/1Β½±τ²ϊ Bramley apples, peeled, cored and roughly chopped
50-75g/2-3oz caster sugar
2 tbsp demerara sugar
250g/9oz natural (uncoloured) marzipan, thinly sliced
25g/1oz butter, plus extra for greasing
200g/7oz clotted cream, to serve
2 free-range egg yolks, lightly beaten
2 x 320g/11oz ready-made all-butter puff pastry sheets (about 35cm x 23cm/14in x 9in)