Wash the cherries, dab dry and, except for 4 cherries for decoration, remove the stones. Bring half of the cherries, sugar, 6 tbsp cherry nectar and 1 tbsp cherry brandy to the boil. Mix starch with 2 tablespoons of cherry nectar and stir into the sauce.
Let simmer for about 5 minutes, then puree with a blender in a high container, let cool down. Roughly chop the chocolate.
Stir the chocolate, 1 tbsp. kirsch and the remaining cherries into the yoghurt. Arrange the cherry sauce and yoghurt in layers in glasses and decorate with 1 cherry each.