Shaking Beef

I've missed a couple of days of writing, so this will be quick. D. and I have been unwell, and I've been working hard on my entry to the one-key comp on Retro Gamer. Anyway, we cooked up a quick meal of shaking beef. D. cubed the fillet steak, set out some sliced tomato and cucumber on the plates, and made the dipping sauce and the rice. She then asked me to do the shaking. I got the pan really, really hot (i.e. put it on the biggest gas burner, on high, and wait a few minutes). Then a tiny bit of vegetable oil (which starts bubbling) and throw in half the beef. Shake the pan constantly so the beef doesn't stick or burn. It starts smelling like a BBQ almost straight away. After a minute or two, in with half the onion. Continue shaking until the onion is browned, then turn of the gas. In with a huge dollop of butter, quickly mix everything up before the butter starts burning, then onto the plate to be eaten straight away. Repeat for the second plate. Delish!