Peel, wash and cut into cubes 4 large potatoes. Cook the potatotes in a pan with hot water until brown. Drain and reserve.
Chop 2 onions and fry them in a pan with hot water without browning. Drain the oil and reserve. Mix 4 eggs, a tablespoon of chopped parsley, salt and pepper to taste.
Combine in a large bowl the potatoes and onions, add salt and pepper to taste and add the beaten eggs. Mix well.
Bring a skillet over high heat with oil and when hot pour the preparation of potatoes. When you have cooked the base, lower the fire Turn the omelette and complete the cooking.
You can serve hot or cold.