You’re going for a low-and-slow cook here as opposed to doing this the blazing-hot diner way so you’ll end up with the most tender omelet possible. And keep in mind: Technically, a French omelet shouldn’t have any browning whatsoever, but if yours picks up some color, don’t sweat, it’ll still be absolutely delicious.
Source: https://www.buzzfeed.com/rossyoder/potato-chip-omelet-recipe-the-bear-hulu