This dish is also known as croquettes and it is a very popular dish to eat in Madrid. These are a type of tapa, tapas are small portions of food that are often served as appetizers in Spain. Croquetas are deep fried and breaded bite sized pieces that are filled with bechamel sauce. In addition to the bechamel sauce, croquetas can also be filled with cheese, chicken, or ham. Ham is one of the more popular fillings for croquetas. Croquetas are often served in bars and restaurants all over Spain. But, they are also easy to make at home because they only consist of flour, butter, milk, bread crumbs, and ham or other fillings.