Heat control is crucial here. Too much heat, and the whites will toughen and brown at the edges. Not enough, and the yolks will cook partway through by the time the whites are set. Listen to the pan, and watch the whites for cues that your pan is properly heated. We use a little extra oil in this dish so there's enough for basting. The hot oil baste lets you set the whites without covering the pan and clouding the yolks. Season after the eggs are done so the basting doesn't wash off the salt and pepper.