Whip the cream until stiff. Stir the low-fat quark until creamy and fold in along with sugar and vanilla sugar. Drain and dice the peaches or apricots.
Now everything is layered in a bowl as follows: Half of the curd and cream mixture, ladyfingers, eggnog, peaches or apricots and the rest of the curd and cream mixture. Sprinkle with flaked almonds or chocolate sprinkles as a finish.