陆 lemon, whole peeled rind only
25g/1oz plain flour, plus extra for dusting
250g/9oz caster sugar
1 cinnamon stick
12g cornflour
vanilla seeds from one vanilla pod
4 free-range egg yolks, plus 1 whole free-range egg
300ml/10陆fl oz milk
300g/10陆oz ready-made all-butter puff pastry