Tortell de reis (Magi's cake)
In my country, Catalonia, we it this dessert the 6th January, for the Magi's day. Normally we hide a surprise and a bean in the marzipan filling. It is said that the person who gets the bean pays the meal and washes the dishes, and the one who gets the surprise is the king/queen of the day.
Before starting I recommend you not to be impatient, because the secret of success with this recipe depends on respecting the waiting times.