Drain the cherries on a sieve. Toast pumpernickel, let it cool down and cut it into fine cubes. Crumble meringue. Chop hazelnuts roughly. Mix quark, crème fraîche and sugar.
Whip cream and vanilla sugar until stiff and fold in. Add pumpernickel, meringue and hazelnuts. Layer the curd cream and cherries in glasses and leave to stand in the fridge for an hour.