Mix the sugar, the 2 egg whites, the ground almonds, the maraschino and enough sponge crumbs to make a rollable dough.
Colour half of this dough red with food colouring.
Also prepare the chocolate dough separately: beat the sugar with the egg white until foamy, add the ground chocolate and roasted, ground hazelnuts, mix until smooth.
Roll out both doughs (the almond and the chocolate) to equal thickness, and cut into rings.
Stack the rings so they form a medium-sized round: the centre red, surrounded by white (almond), the outer layer chocolate - and also make it the other way round, for a varied pattern.
Brush with egg white, and bake.
Based on: Malatinszky Fanny szakácskönyve (a classic Hungarian cookbook), modernised. Calories and protein are estimated.