In a medium bowl add your sliced beef, shaoxing wine, 1 tablespoon of soy sauce, white pepper and cornstarch and allow to marinade while your rice noodles are soaking.
Soak your dried rice noodles (medium or extra wide) in a bath of hot water for about 3-5 minutes or just until they start to softened but not completely al dente. (FYI: Noodles will continue to cook when they are fried.) Rinse noodles with cool water, drain and set aside.
Put 1 tablespoon of oil in your wok (frying pan) and turn on medium-high heat . Once the temperature is at medium heat add the onions and garlic and fry for a minute just until the aroma hits your nose.
Add your marinated beef to the pan and stir fry for a minute or two or just until turns golden brown. Remove beef and onions to a plate and keep warm and set aside. If you wanted to cook some other veggies then you would add them at this point and stir fry until crisp tender and then remove from your pan. We stir fried sliced snow peas as that is what we had on hand. (Feel free to add any quick cooking thin sliced vegetables at this time and stir fry until crisp tender and then remove from pan.) If you choose to add bean sprouts (sprouted mung beans), wait to add them to the pan until you have added all the sauces at the end of the cooking process.
Add 1 tablespoon of oil and your presoaked noodles to the seasoned pan turn up the heat to medium high. Move the noodles quickly around in the pan keeping them separated so they do not stick. (feel free to add a little more oil or a little more water just to prevent sticking and to confirm that your noodles are aldente- test a noodle)
Add your beef mixture and stir fried snow peas or veggies cooked back to the noodles and add XO sauce, Tamari (soy sauce), oyster sauce, and mix until well incorporated. If you want to add in bean sprouts, you would add them to the pan at this time and just toss until warm but crisp.
Serve Pan Fried Beef Noodles with Spicy XO Sauce with a sprinkle of green onions for garnish and get ready to make second helpings...