In a medium bowl, mix the julienned strips of pork, water, oyster sauce (or soy sauce), cornstarch, and oil until well-incorporated. Set aside to marinate for 15 minutes.
Make the moo shu sauce by mixing the hoisin, hot water, soy sauce, and sesame oil in a small bowl. Microwave for 20 seconds and set aside to serve at the table.
In a measuring cup or small bowl, make the seasoning for the filling. Combine the hot water, hoisin sauce, oyster sauce, soy sauce, sesame oil, cornstarch, dark soy sauce, and white pepper.
Heat your wok until it’s just starting to smoke, and spread 2 tablespoons of oil around the perimeter to coat. Pour in the beaten eggs. Quickly mix and scramble the eggs, turn off the heat, and break up the eggs into smaller pieces. Remove to a plate and set aside.
Heat another tablespoon of oil in your wok, and add the pork. Lightly sear on all sides until about 80% done, and remove from the wok.
Add the remaining tablespoon of oil to the wok, increase heat to medium-high, and add the garlic, cabbage, carrots, shiitake mushrooms, and wood ear mushrooms. Stir-fry for 1 minute. Add the Shaoxing wine, and continue stir-frying for another 30 seconds.
Next, add the sauce mixture and cooked pork. Continue to stir-fry for another 1 to 2 minutes. Toss in the cooked egg and scallions, and continue to mix for another 30 seconds, or until the vegetables are wilted and most of the liquid has cooked off. If there is more liquid in the wok (which may happen if your heat is too low), then add a small amount of cornstarch slurry (equal parts of water and cornstarch) to thicken it. Serve immediately with the moo shu pancakes and the moo shu sauce!
Notes
Nutrition information is for 1 serving of moo shu pork filling only (1/6 of recipe). See Moo Shu Pancake recipe for separate nutrition information.