5Slice the beef flank against the grain to get big pieces.
6Tenderize the beef with baking soda, cornstarch, soy sauce, dark soy sauce, ShaoXing cooking wine, and white pepper. Mix it up real good and let it marinate for 15 minutes.
7Make the sauce with oyster sauce, dark soy sauce, regular soy sauce, sugar, chicken bouillon, white pepper, and sesame oil.
8Heat your wok with a generous amount of oil and add in the marinated beef. Do a shallow fry so it gets a nice crust.
9Once it's about 90% cooked, strain the beef from the oil and set it aside.
10To the wok, add your ginger and garlic.
11Add dried chilies if you want to make it spicy.
12Add in the onions. Make sure your heat is on high because this happens real quick.
13Make sure the onions still have a bite to them. Add in the beef and then the sauce.