Cut the beef into thin slices and add the marinade ingredients and let the beef marinate for 15 minutes
Cook the beef:
Preheat 1 Tbsp of oil in a skillet. Add the beef slices and cook until they just start to turn color and start to lose the pink. Remove from the skillet. Don't overcook the beef
Prepare the gravy:
In the same skillet, add garlic and saute for 20 seconds until fragrant. Add the cooking wine to deglaze the pan. Scrape the bottom of the skillet to loosen the brown bits. Add the chicken/beef broth, oyster sauce, sugar. Bring to a simmer
Thicken the gravy:
Combine cornstarch with water. Pour this into the skillet and keep stirring until the gravy thickens
Drizzle in the beaten eggs and let them cook undisturbed for about 10 seconds and then gently stir it
Add the beef back in and stir to combine everything. Have a taste and adjust seasonings if needed. Add the chopped green onion and turn off the heat