How to make
Beat the sugar with the ground walnuts, add the eggs 1 by 1, the lemon zest and vanilla.
Bake a cake layer from the resulting mixture and cut it in 2 once it cools.
Stick the 2 halves together with cream, which is made by beating the whites with the powdered sugar, ground walnuts, rum and grated chocolate.
Pour a hot glaze over the cake, made from the heated together cocoa, milk, sugar and butter.
