Beat the eggs with the sugar until creamy. Add oil, yoghurt and grated chocolate. Mix the flour and baking powder together and stir into the dough. Spread the dough on a greased baking sheet and prebake in a preheated oven at 180 degrees for about 10 minutes.
In the meantime, drain the cherries.
Streusel:
Melt the margarine, let it cool down a little and mix it with sugar, flour, cocoa powder, cinnamon and vanilla sugar to make a crumble dough.
Spread the cherries on the pre-baked dough and spread the chocolate sprinkles over it like blobs. Bake the cake for another 2o-25 minutes. Make a chopstick test.