Coarsely chop the nut kernels and roast them in a hot pan without fat. Remove. Roast ground nuts in 2-3 portions in the pan while stirring constantly. Take out. Let the nuts cool down.
Chopping chocolate. Melt with butter in a hot water bath. Cool down. Grease a springform pan (26 cm Ø) and sprinkle with sugar.
Separate eggs. Beat the egg whites until stiff, chill them. Beat the egg yolks and 250 g sugar with the whisks of the hand mixer in a large mixing bowl for about 5 minutes until foamy. Stir in ground nuts and liquid chocolate briefly.
Add the chopped nuts and then the beaten egg white.
Spread the mixture into the mould. Bake in the preheated oven (electric oven: 175 °C/circulating air: 150 °C/gas: level 2) for 45-55 minutes, the cake should still be slightly moist inside. Leave to cool in the mould for about 20 minutes.
Then remove from the mould and allow to cool completely.
Wash the strawberries, put some aside for decoration. Clean the rest and cut into slices. Sprinkle with 2 tablespoons of sugar and let the juice steep. Mix crème fraîche and vanilla flavouring. Whip cream until stiff and fold in.
Cut the cake into about 20 cube-shaped pieces. Serve with strawberries, juice and vanilla cream. Halve the rest of the strawberries and decorate the pieces with them.