Measure 50 ml of the milk and use it to mix the cornstarch. Bring the remaining 450 ml milk with sugar and vanilla sugar to the boil and bind with the mixed cornstarch.
Chill the pudding and stir it every now and then.
Whip the cream with a little sugar until stiff and mix with the quark, which has been stirred until smooth. Carefully fold the cold pudding into the quark cream mixture and add more sugar if necessary.
Let everything slide into a beautiful glass bowl.
Puree the strawberries and spread over the pudding mixture.
Sprinkle thickly with grated chocolate and chill until ready to eat.