Tarta de Santiago is a traditional almond cake from the region of Galicia in Spain. It is made with ground almonds, eggs, sugar, and lemon zest, and it is often dusted with powdered sugar and decorated with the cross of Saint James. This moist and flavorful cake is a must-try dessert when visiting Gran Vía. Pair it with a cup of coffee or a glass of sweet wine for a perfect ending to your meal.