This Spanish bocadillo sandwich variety uses thick slices of tortilla francesa or French omelet as a filling. The sandwich can be prepared with a Spanish-style baguette (barra de pan) or a mollete (a soft, round, and flattened Andalusian bread roll), which is usually cut in half along the middle and stuffed with the omelet.
To make the sandwich juicer, the interior of the bread is often rubbed with ripe tomato halves or drizzled with olive oil. Other typical additions include slices of cheese, crispy bacon or chorizo sausage slices, ham, tomatoes, or slices of chicken breasts.