This absolutely depends on Crème de Mûre Sauvage to make it a special dish.
blackberries
Put equal portions of blackberries and blueberries into a dish and add enough Crème de Mûre Sauvage
to moisten but not swamp Picture . Cover and put in the fridge for at least a couple of hours or preferably over night.
Put the marinaded fruit into serving dishes and put a little creme fraiche on top.