I used the non stick pans and they worked great. Thinly slice the potatoes. I used red this time.
Put them at the same moment into plenty of olive oil and add spices. I used pepper, garlic, and onion. It is better with fresh, but I had powder. Cook medium or low until the potatoes are soft and have absorbed a good bit of the Oil. I don't brown the potatoes. I both cover and uncover.
Take the wooden spatula and coarsely chop the potatoes.
In a small bowl wisk the eggs. Pour the cooked potatoes in the bowl and stir to mix. Pour the mixture back in the pan and shake to keep from sticking. I cooked this section at medium.
Cook until the eggs are done. Flip the tortilla. This pan made that very easy, but I still placed a plate on the top and turned the whole tortilla over and slid it back in the pan.
Cook again until the egg is fully cooked. Again, don't brown.
Slide on a large plate. Done.