Chistorra Croquette (Croqueta de Chistorra)

Round croquette served on a slice of cured ham and a toasted bread base, topped with a dot of sauce. Served as a pair.

Cafetería Rúa - Santander

The tapas dictionary

Croquette
A croquette is a fried fritter, typically made with a béchamel sauce and finely chopped ingredients such as ham, chicken, or cod. It is usually served as a tapa or appetizer, often with a drink. Its origins trace back to France, but it has become extremely popular in Spain.