Bocadillos or bocatas are Spanish sandwiches made with Spanish-style baguettes known as barra de pan, unlike regular sandwiches which are made with modern white bread, known as pan de molde in Spain. The most common fillings for bocadillos include meat, cheese, tuna, omelets, jamón, or chorizo sausages.

The Spanish typically don't add onions, mayonnaise, pickles, or lettuce to bocadillos, but the bread is sometimes rubbed with halved tomatoes or olive oil. Due to the popularity of these sandwiches, the fillings vary from one region to another – omelet bocadillos are usually eaten for breakfast or as an afternoon snack and include eggs, cheese, beans, peppers, and potatoes; meat-based bocadillos are often made with chicken, beef, pork, horse, or goat; and fish bocadillos often include cuttlefish, sardines, and squid.

These sandwiches can be found everywhere from bars and taverns to roadside eateries, but you probably won't find one on a restaurant menu.