Tortilla Española

Tortilla Española — also called tortilla de patatas — is Spain's beloved potato-and-egg omelette: thin slices of potato (and, for many, onion) cooked gently in olive oil until soft, then bound with beaten egg and set into a thick, golden cake. Cooked in a pan and flipped to brown both sides, it is sliced into wedges and eaten warm, at room temperature, or cold from the fridge the next day.

It is one of the most versatile dishes in Spanish life: a tapa speared on a toothpick in a bar, a filling for a crusty bocadillo sandwich, a picnic staple, or a quick supper at home. The great national debate is over doneness — con cebolla (with onion) versus sin cebolla, and whether the centre should be just-set or lusciously runny. For more of Spain's table, see Patatas Bravas and Paella Valenciana.

The potato tortilla is a relatively modern classic, made possible only after the potato — brought to Europe from the Americas — became a cheap, filling staple in Spain during the 18th and 19th centuries. A frequently cited origin story credits early-19th-century Navarre, where cooks are said to have stretched scarce eggs with plentiful potatoes to feed families through hard times; whatever its exact birthplace, it spread quickly as affordable, satisfying food.

Today the tortilla is close to a national emblem, found everywhere from village bars to home kitchens across every region of Spain. Its simplicity — potatoes, eggs, olive oil and salt — is precisely what makes it a canvas for endless argument and pride, and few dishes say "Spanish comfort food" more directly.