Tortilla de Patatas by Gloria

Wikipedia Says:

Tortilla de patatas (potato omelette in Spanish) is a popular dish in Spain that can be served either cold or hot. It is also served as a tapas dish. Although potatoes and eggs are the basic and often the only ingredients of a tortilla de patatas, other vegetables can also be found accompanying it such as onions and, more rarely, red peppers, chives, artichokes, ham or even chorizo, which is then called tortilla paisana. In Spain the dish is also sometimes called tortilla española (Spanish omelette) to differentiate it from tortilla francesa (French omelette).

It should not be confused with the Mexican tortilla, made of unleavened flour.