Scallion beef stir-fry, pronounced cong bao ngau in cantonese and cong bao niu () in mandarin, is a great dish, and some good wok hay from a trusty carbon steel wok makes all the difference. onion scallion beef tender, juicy beef stir-fried with onions and scallions in a chinese brown sauce. delicious and easy recipe. the onion imparts a sweet flavor once its cooked and caramelized, plus it adds extra texture to this onion scallion beef recipe. pair this with some of these asian noodle soup recipes: brothy chinese noodleslanzhou beef noodle soupslow cooker pork ramendumpling soup.