Soak the noodles in hot tap water. In a bowl, mix the steak with the cornstarch, soy sauce, and shaoxing wine. Set aside.
In another bowl, whisk together ⅓ cup water, oyster sauce, sweet soy sauce, sesame oil, pepper. Set aside.
Heat up the oil in a wok or frying pan over medium high heat. When hot and shimmery, add the steak, along with the marinade in the bowl and cook, stirring, until slightly crisp, 1-2 minutes. Add the onions and broccoli and stir fry until bright green, 1-2 minutes
Drain the noodles and add them into the pan and toss everything together. Stir in in the sauce and toss well, frying. Taste, adjust the seasoning, then enjoy!
