"I was a little skeptical of this recipe because I never get enough flavor when I do quick marinades, but I'm glad I gave this a try. The flavor was spot on. Complimented the steak, instead of hiding its natural flavor (done medium rare). I used sirloin was instead of flank, and the scallions were omitted. Used regular dark soy and regular sesame oil (the non-toasted variety), because those were all I had. Paired it with my own cole slaw recipe. Even my mom who does not like rare anything, tasted it and said the flavors are really good. Quick, simple, and delicious meal.