Deseed the melon. Use a ball cutter to remove balls or cut melon into slices, peel and dice. Wash, halve, stone and slice the plums.
Caramelise the sugar in a pan until golden. Deglaze with orange juice and simmer until the caramel has completely dissolved. Add cinnamon. Carefully mix in plums and melon.
Remove the pan from the heat and let it cool down a little.
Mix crème fraîche and vanilla sugar. Wash the lemon balm, shake dry and put a few leaves aside for decoration. Cut remaining lemon balm into fine strips.
Arrange caramel fruits and vanilla-crème-fraîche. Sprinkle with melissa and decorate.