Сделать текст легким для пересказа ( сократить) . how to make a spanish omelette you need 400g of potatoes, 1 large onion, 5 eggs, 100ml of vegetable oil, 4 tablespoons of olive oil, salt and pepper. 1) first slice the potatoes and chop the onion. 2) heat the vegetable oil in a frying pan. add the potatoes and onions and fry them for about 15 minutes. remove the mixture from the pan. 3) whisk the eggs in a bowl with salt and pepper, add the potato and onion mixture and mix well. 4) heat the olive oil in a smaller frying pan and pour in the mixture. cook over a medium heat for about 5 minutes. then turn the omelette and cook it on the other side as well. 5) serve hot or at room temperature with a green salad.