Roast the almonds in a coated pan without fat until golden brown and let them cool down. Whisk egg yolks, 125 g sugar and vanilla sugar in a hot water bath for approx. 10 minutes until thick and creamy. Then let it cool down
Whip the cream until stiff. Stir the crème fraîche first, then the cream and almonds into the egg mixture. Line a box form (approx. 3/4 l capacity) with foil. Fill in the mixture, freeze overnight
Select the berries and wash them if necessary. Strip currants from the panicles. Boil up about 3/4 of the berries, 2 tablespoons of sugar and juice. Stir starch with 2 tbsp. water until smooth. Bind the juice with it. Stir in the rest of the berries, cool down
Turn over the parfait and remove the foil. Cut parfait into 8-12 slices. Serve with the fruit sauce. Decorate with lemon balm