Tarta De Santiago Named after the patron saint of Spain, this cake is common in Galicia, where there is a shrine to St James (lago) in Santiago de Compostella. It is traditionally adorned with a stencil pattern of his sword using icing sugar. It is a flourless, butterless cake with whole almonds still in their skins, finely ground. You must use a coffee grinder or spice grinder - an ordinary food processor will not grind them finely enough. Alternatively, you can use ordinary ground almonds, but the flavour and colour will be different.