Years ago I took a series of Chinese cooking classes. I lost the recipes that I had acquired there and just recently found them again. Here's one of our favorites. To make the steak easier to slice, take the meat out of the freezer for about 1 1/2 hours before slicing. If it's cut on the diagonal, it will curl during cooking. And as with most stir-fries, prepare all of the ingredients ahead of beginning the cooking, as it will go very quickly once started.