Beef lovers go crazy over this one at the restaurant. Flank steak is cut into bite-sized chunks against the grain, then it's lightly dusted with potato starch (in our case we'll use cornstarch), flash-fried in oil, and doused with an amazing sweet soy garlic sauce. The beef comes out tender as can be, and the simple sauce sings to your taste buds. I designed this recipe to use a wok, but if you don't have one a saute pan will suffice (you may need to add more oil to the pan to cover the beef in the flash-frying step). P. F. Chang's secret sauce is what makes this dish so good, and it's versatile. If you don't dig beef, you can substitute with chicken. Or you can brush it on grilled salmon.