Bocadillo or bocata de lomo is a Spanish sandwich that consists of bread filled with pork tenderloin. A Spanish-style baguette (barra de pan), mollete, or ciabatta is typically sliced in half lengthwise, and it is then often toasted or grilled for added crunchiness.
Both sides of the bread are usually rubbed with ripe tomato halves and garlic cloves on the inside, and the sandwich’s filling can be enhanced with the addition of cheese, tomato slices, peppers, onions, or even slices of Spanish tortilla (potato omelet).
The pork tenderloin can be cured or uncured, and it is usually cooked a la plancha - meaning that it's grilled on a type of flat, metal plate commonly used for cooking meat or fish in Spain. This sandwich is typically eaten for lunch or dinner, although it can also be enjoyed as a filling snack at any time of the day.