Tortilla de patatas is simply prepared and tastes quite delicious.
Peel the potatoes and onions. Cut the potatoes into cubes or thin slices.
Cut the onions into fine dices.
Heat about 4 tablespoons of olive oil in the pan, add the potatoes and onions and cook whilst moving the food about for 20-25 minutes on medium heat. The potatoes should not be roasted. Possibly precook the potatoes slightly.
Add salt and pepper to taste.
Thoroughly blend the eggs in and the potatoes and then add the onions. Leave to stand for about an hour.
Heat 4-5 tb of olive oil in the pan and let the mass falter at medium heat for about 5-8.
Then turn the tortilla upside down. To do this one needs to cover the pan with a large plate and turn the tortilla on the plate. Let it glide back into the pan and finish cooking.
The tortilla can be tasted cold or warm. For serving it will need to be converted into pie pieces.
You may add peppers, pepper salami if you like.