One of the greatest failures of my culinary career. Two eggs (even very large ones) didn't seem sufficient to absorb the whole of one medium onion finely chopped, I failed to turn down the heat sufficiently to accommodate 3--4 minutes cooking each side (so the first side went dark brown) and the onions remained stubbornly undercooked. Next time : three eggs, not two; half an onion, not a whole; and remember to turn the heat down as soon as the egg hits the pan.
I was so disappointed I binned the remainder and cooked my one remaining egg as a simple omelette au nature, just picking up whatever odds and ends remained in the mixing bowl.
** Phil.