Tortilla de Patatas

*1 large potato, peeled and diced
*3 eggs
*1/2 onion, chopped
*3/4 cup olive oil
*salt

Heat oil in a nonstick frying pan and then fry the potatoes until almost soft. Add the onion and fry until all are soft. Drain the oil.

In a large bowl, whisk the eggs with a fork and add salt to taste. Add potatoes and onion and mix well. Heat a little oil in a frying pan on moderate heat and pour in the egg mixture. Once the bottom of the omelet has set, turn the heat down low and cover the pan. After 10 minutes, turn the omelet and continue frying until it has set all the way through.