Soak gelatine in cold water. Mix grape juice, lemon juice and sugar. Sort the raspberries. Wash and drain the blueberries and currants. Pluck the currants from the panicles.
Squeeze the gelatine, dissolve and stir into the grape juice. Rinse a bowl (approx. 1600 ml content) with cold water. Put some fruits aside for garnishing each bowl. Put half of the remaining fruits and juice into the bowl.
Chill for about 30 minutes until the mixture begins to gel. Add the remaining fruit and juice and chill for about 5 hours. Topple, hold the bowl briefly in hot water and carefully remove the jelly from the rim of the mould and turn it over onto a plate.
Decorate with lemon balm and the remaining fruit. Wine mousse sauce tastes good with it.