How can I make a delicious Spanish egg tortilla at home?

To make a delicious Spanish egg tortilla at home, you will need eggs, potatoes, onions, olive oil, salt, and pepper. First, peel and slice the potatoes and onions, then fry them in olive oil until they are soft. Beat the eggs in a bowl and season with salt and pepper. Add the cooked potatoes and onions to the eggs and mix well. Pour the mixture into a hot pan with olive oil and cook until the bottom is set. Flip the tortilla and cook the other side until it is cooked through. Serve warm and enjoy!