Try as I might, I simply can’t flip an omelet the way it's done at fancy restaurants. So I get the same effect by making a layered omelet. If you don’t like my mushroom filling, use your own favorite filling, such as salsa, jam, sauteed ham and onions, and so on. Use an 8-inch or 10-inch skillet to make your omelet, but avoid using a 12-inch skillet, which would make it too thin.