Beetroot and chocolate mousse cake

This flourless, eggless mousse cake is a real oddity in that it tastes both sweet and slightly savoury and it seems to alternate flavours of chocolate and beetroot on the tongue. It can be made vegan by using some of the really good sugar- and dairy-free chocolate available (my favourite is from Rococo) but, funnily enough, it’s delicious served with whipped cream! If you can’t get hold of really dark chocolate, then use the darkest you can find and add a few tablespoons of dark cocoa – it