What is "neula"

Neula (, plural: neules) is a type of Catalan biscuit, eaten traditionally in Christmas with cava (Catalan champagne) and torró. They are often dipped into cava. It consist of a very thin sheet of a mixture of egg whites, butter, sugar and flour, flavoured with lemon and rolled. At present there are some other popular versions, as neules stuffed with torró de Xixona or others covered with a chocolate lay. At present, although they are typical on Christmas, they can sometimes be eaten during the rest of the year, for example with crema catalana or ice creams.