A rich chocolate dessert made all the more luxurious with ground almonds, rum and espresso powder. I once saw Ina Garten mention in one of her oh-so-fabulous Hamptons TV series that espresso powder will amplify the flavour of even the most mediocre chocolate and it certainly does the job in this pie. The eggs are separated and the whites whisked until light and fluffy, providing an almost souffle-like finish to the batter.