🇪🇸 Spain · Family: Bocadillo de Tortilla & Revuelto · Heat: Griddled · Bread: barra · Proteins: egg
The Bocadillo de Tortilla sin Cebolla is the other side of the same argument. It is a wedge of Spanish potato omelette built deliberately sin cebolla, no onion, pressed into split bread and eaten cold. The omission is the whole point. Purists who prefer it this way want nothing standing between them and the taste of the potato and egg, and they regard onion as a distraction that muddies a clean thing. Catalogued on its own because the choice is a stated one, not an accident of a missing ingredient.
Without onion the build has fewer moving parts, which raises the stakes on the parts that remain. Potatoes carry the entire flavor, so they are peeled, cut, and cooked slowly in plenty of olive oil until tender and faintly sweet on their own terms, never browned hard. They are drained well, folded into beaten salted egg, and rested so the egg works into the starch. The mixture sets in a hot pan, gets flipped with a plate, and is pulled while the center is still jugosa, slightly loose. A wedge goes into a barra or rustic roll. Good execution is a tortilla that tastes distinctly of good potato and olive oil, custardy at the core, clean. Sloppy execution has nowhere to hide: bland watery potato, oversalting to compensate, or a dry fully cooked block reads immediately because there is no onion sweetness to paper over it. The bread should hold the wedge without crushing it or going greasy.
The reason this version earns a separate entry is precisely the onion debate it answers: it exists in opposition to the con cebolla camp, and many bars will tell you which they make because regulars care. Within the no-onion side the arguments shift to potato cut and how loose to leave the center. The same plain wedge accepts chorizo or roasted peppers when someone wants more, though that pulls it away from the minimalist intent. The onion-forward version is a genuinely different sandwich and deserves its own article rather than being crowded in here.
More from this family
Other Bocadillo de Tortilla & Revuelto sandwiches in Spain: