First cut the potatoes into thin slices and fry with chopped onion until soften. Then french fries and onion pouring in slightly beaten eggs, add salt and the mixture is divided into two. Fry the first half of the mixture as a pancake when inverted on the top side is placed cheese. When cheese is melted tortilla remove from heat and put in a bowl with the cheese up. Fry the second half of the mixture on one side and ranks ham. When this part of the tortilla is ready to remove and put on the first, so the cheese and ham are in the middle.