This delightful cake bears an unusual but classic feature: cooked egg yolks are passed through a sieve and mixed into the simple syrup to form the icing, which is then boiled until nice and thick enough to spread. You'll just have to make it for yourself to see how wonderful this can be, especially when used to decorate a lovely cake that's made with ground almonds and no flour (so it is gluten free) and lots of eggs and sugar.