Beat the egg(s) well with a pinch of salt and pepper. Set aside. Prepare all your other ingredients and have them at the ready.
Heat an omelet pan over medium-high heat and add the butter. Swirl it around as it melts. Once it foams up, add the eggs and swirl the pan to coat the bottom with egg.
REDUCE the heat to low and gently lift the cooked edges of egg to allow the uncooked parts to run underneath.
Once the bottom is set and the top is almost set, add your fillings in a line down the centerish of the omelet.
Gently fold the omelet over and roll or scootch the omelet out of the pan.