Defrost the raspberries. Whisk the egg whites and 3 tablespoons of sugar in a bowl with the whisks of the hand mixer. Gradually add grape juice and wine and stir in.
Place in the refrigerator compartment for about 4 hours. Stir the mixture several times with a whisk during the freezing process. Use 2 tablespoons to form 8 cams from the sorbet. Place on an oiled plate and freeze again.
Puree the raspberries with a chopping stick. Pass the raspberry puree through a sieve. Season to taste with vanilla sugar. Wash the grapes and dab them slightly dry. Roll in the remaining sugar. Stir crème fraîche until smooth and put it into a plastic bag.
Cut a small corner from the top. Pour onto four plates of a raspberry mirror. Place 12 crème fraîche dots on each plate. Connect the dots with a chopstick. Place the cams on the mirror.
Serve the plates immediately, decorated with grapes and a lemon balm leaf.