Mix the quark with vanilla sugar, rum flavoring, sugar and milk to a soft cream.
Drain the morello cherries in a sieve and drain well. In the meantime, crumble the pumpernickel. Grate or chop the chocolate and mix with the bread.
Then layer everything in a glass bowl, starting with the quark cream, then the chocolate-pumpernickel mixture, then the morello cherries, repeat until everything is used up.