Peel the persimmons, cut out the stalk and cut the flesh into small pieces. They should be really nicely ripe for full flavor.
Fillet the oranges, place in a bowl and squeeze out the juice, which is still on the skin, over the fillets.
Put the persimmons, the orange fillets including the juice, lime juice and yoghurt in the blender and puree them very finely. Add the honey and the mineral water, mix again briefly.
Fill two nice, chilled glasses with it, garnish with lemon balm and enjoy immediately.