It’s been five years since this rendition, but the theme remains the same because the classic combination of chocolate, nuts, caramel/fudge just works so well. I hold rich desserts (in moderation) under my belt (pun intended 
).
A chocolate semifreddo (though it looks like just a mass of chocolate mousse): semi-frozen dark (70%) chocolate custard with whipped cream (and, here, meringue) . Inside hide* raisins plumped-up with Pedro Ximénez, and underneath sits a layer of hazelnuts (for me, the No. 1 nut with chocolate) set in a vanilla-(cream-)fudge.
Chocolate semifreddo, PX raisins, hazelnuts, vanilla fudge
*The best desserts have an element of surprise.