Mix crème fraîche and vanilla sugar. Seed the honeydew melon. Cut out small and large balls with a ball cutter. Alternatively cut melon into slices, peel and dice.
Wash and drain the plums. Halve plums, stone them and cut them into slices. Melt butter in a pan, add cinnamon sticks. Add plums and fry briefly on both sides.
Sprinkle with sugar, allow to caramelise briefly while turning, remove and set aside. Deglaze caramelized sugar with orange juice, bring to the boil and simmer for 4-5 minutes. In the meantime, wash the lemon balm, shake dry and cut into strips, except for a few leaves for decoration.
Carefully mix plums and melons into the caramel mass. Arrange on plates. Sprinkle with lemon balm and decorate. Add crème fraiche.