Cover and leave to rest in the fridge for a few hours, or overnight. Meanwhile, make the lemon curd. Put the lemon zest and juice, salt, sugar and butter into a small saucepan and heat gently ...
Often egg yolks are left over after making meringue, but here they’re used to make lemon curd and to give a luxurious filling. This recipe makes more lemon curd than you need to fill the roulade.