Fry the potatoes

• Heat the olive oil in a frying pan and fry the potatoes until golden.
• Season with salt and stir from time to time.

Add the onion

• Add the onion to the pan and fry everything together until the onion is soft but not browned.

Mix with the eggs

• Transfer the warm potatoes and onion to a bowl.
• Add the beaten eggs so they fully cover the potatoes and mix quickly to combine without cooking the eggs.

Rest the mixture

• Leave the mixture to rest so the flavours combine.

Cook the tortilla

• Pour the mixture into a lightly oiled pan over low-medium heat and cover with a lid.
• When the eggs on top are almost set but still slightly liquid, place a plate on the pan and flip it upside down.
• Gently slide the tortilla back into the pan and cook for a couple of minutes more.

Serve

• Slide the tortilla onto a plate and serve warm or at room temperature.