This chocolate mousse with fleur de sel strikes the perfect balance between richness and subtlety. It's made with egg yolks and sugar, cooked after the cream is incorporated, and then poured warm over chocolate. The fleur de sel enhances the flavours before the mixture is gently folded into a meringue for an airy texture. Serve it chilled in cups and top the mousse with a generous spoonful of whipped cream. For the perfect pairing serve it with chocolate-coffee mini madeleines.