Mix both types of rusk finely in a universal chopper. Melt butter in a small pot. Mix rusk, gingerbread spice and butter. Press the crumb mixture as a base into a greased springform pan (26 cm Ø), chill for about 30 minutes.
Chop 100 g chocolate and melt over a warm water bath. Mix quark, sugar, pudding powder, eggs and oil. Halve the mixture. Stir liquid chocolate into one half.
Alternately pour 2 tbsp. each of the light and dark masses onto the centre of the crumb base until both masses are used up. Knock the mould a few times on the work surface in between. Cake in the preheated oven (electric cooker: 150 °C/ convection oven: 125 °C/ gas: see
manufacturer) Bake for 50-60 minutes. Turn off the oven, open the door a little and let the cake cool down in the oven.
Grate the rest of the chocolate coating into small rolls using a peeler. Carefully remove the cake from the mould and place it on a plate. Decorate with chocolate rolls. Whipped cream is delicious with it.