Toast the hazelnuts in the oven at 175° C for 10 min until the shells have darkened
Wrap the hazelnuts in a towel and rub till the shells of the hazelnuts has fallen off the nuts
Blend the hazelnuts until they turn into butter (this might take some time)
Whisk the hazelnuts with the other ingredients till it has become a uniform mass
Pour the mousse into small glasses
Let the mousse sit for 30 min in the fridge before serving
Garnish the mousses with fruit