Soak the gelatine. Heat milk. Dice marzipan and dissolve in it. Add liqueur.
Separate the egg. Stir the egg yolk into the warm marzipan mixture. Squeeze the gelatine and dissolve in it. Chill for about 30 minutes. Beat cream and egg white separately until stiff, fold in. For dumplings, fill the mousse into a bowl. Or divide the mousse into 6 dessert bowls. Chill for at least 3 hours
Drain the cherries, collect the juice. Mix 4 tablespoons of juice and starch. Boil up the rest of the juice, sugar and possibly cinnamon. Bind with starch. Fold in the cherries and let them cool down
Possibly shape the mousse into cams. Serve with the cherry sauce. Sprinkle with pistachios and decorate if necessary