The history of the torta Caprese is hard to pin down, but most agree it was born from a mistake when flour was left out of the recipe. Coeliacs and cake lovers will be pleased with its fudgy centre regardless. Serve it with a nip of Liquore Strega (if you can find it), which is sometimes used to flavour the torta.
Note Roasted almond meal is available from supermarkets. If it's unavailable substitute almond meal or hazelnut meal.