What type of dish is made with eggs onion and potatoes in Spain?

In Spain, a popular dish made with eggs, onions, and potatoes is called "tortilla española" or Spanish omelette. This traditional dish features thinly sliced potatoes and sometimes onions, which are sautéed and then combined with beaten eggs before being cooked until set. It can be served warm or at room temperature and is often enjoyed as a tapa or main course.