Pour 2 eggs in a pan, add the sugar and assemble with a whip up to obtain a puffy and clear mixture. Combine the flour and cocoa, several times, continuing to blend with a spatula. Transfer the mixture into a rectangular backing tray covered with baking paper and cook it in the preheated oven at 180°C for 15-20 minutes.
Cool the sponge cake in the pre-cooled Freddy with the function of blast chilling until necessary. In the meanwhile assemble the white eggs with icing sugar and then blend with the Greek yogurt. Strain the sour cherries from the syrup. With the help of a small round pastry ring of the same diameter as the glasses in which you will serve tiramisù, obtain 12 disks from the sponge cake and crumble the remaining sponge cake.
Place a disk on the bottom of 4 glasses, sprinkle with sour cherry syrup, add the cream of yogurt and decorate with some sour cherry. Continue until you finish the disks and complete with some sour cherry and sponge cake crumbled.