done. drain off excess oil. add the onion potato mixture into the bowl with the whisked eggs. toss gently, cover and let sit for 15 minutes.
heat the skillet again over high heat. pour the egg mixture in and cook for a minute, moving the pan and stirring gently with a spatula. turn down heat to medium for two more minutes. check to make sure the edges are not sticking. at this point the omelette should be more or less holding together. now you need to flip it over.
place a plate (must be larger than the skillet) over the skillet and with one hand firmly pressing the plate into the skillet 