Wash, stalk and stone the cherries. Caramelise 100 g sugar in a flat pot. Deglaze with elderberry juice and grape juice. Add cinnamon stick and cherries, bring to the boil and simmer for about 5 minutes. Stir starch and some cold water until smooth. Stir into the juice, bring to the boil again briefly and remove from the heat. Remove the cinnamon stick.
Put the groats into 4 dessert glasses and let them get cold. Cut the vanilla pod lengthwise and scrape out the pulp. Bring milk, 50 g sugar, vanilla pod and pulp, orange and lemon peel to the boil briefly. Remove from the heat and leave to stand for 10-15 minutes. In the meantime, soak the gelatine in cold water, squeeze it out and dissolve it in the warm milk. Pour through a sieve, mix with the yoghurt and pour onto the firm cherry groats