Heat your butter (or wimpy non-fat cooking spray) in your frying-pan/skillet of choice. I use a small, thin non-stick omlette pan. Medium heat, don’t let the butter burn.
Pour in your scrambled egg. Allow to cook for a minute, until you can see that it’s starting to firm up at the edges.
Turn the heat up and stir like crazy until the egg is mostly cooked, but still looks kinda moist.
Toss in the spinach, stir until it starts to wilt…