2 lemons, juice and zest
1 rounded tbsp plain flour
6 rounded tbsp caster sugar, plus extra for the ramekins
3 rounded tsp cornflour
icing sugar, for dusting (optional)
melted butter, for greasing
90ml/3¼fl oz double cream
2 free-range egg yolks, plus 4 free-range egg whites
110ml/4fl oz full-fat milk