Hazelnut, peach and raspberry cake

I like to use blanched hazelnuts to keep the cake light in colour, but unskinned work just as well, if that’s what you have: the colour of the cake will just be darker. The cake tastes great when it is still slightly warm, but it’s also fine at room temperature. It will keep for a day, in an airtight container, but (as with all cakes made with hazelnuts, which tend to dry out quickly) not much longer.