Thinly slice the green onions, separating the whites and the greens. Finely chop the garlic cloves.
Grate a small knob of ginger (½ tsp) if you are using pork. Trim off the ends of the bok choy. Cut in half (or quarters) lengthwise.
In a small container, mix together the Korean chili pepper flakes, sugar, soy sauce, oyster sauce, and Shaoxing wine (if using).
Prepare the bok choy and noodles: Bring a pot of water to a boil. Once boiling, blanch the bok choy for 1 minute, until slightly softened. Remove from the pot and set aside.
In the same water, cook the noodles according to the package instructions.
Meanwhile, to a wok (or pan), add 3 tablespoons of oil and heat it over medium-high heat. Once it's heated, add the white parts of the green onions, garlic, and ginger. Cook for 1 to 2 minutes or until they get a little bit of color.
Add the ground pork and black pepper to taste. Break up the pork and saute for 1 to 2 minutes or until no longer pink. Reduce the heat to medium (or low). Add in the sauce and keep stirring it for 1 to 2 minutes.
Add the drained noodles. Toss together until nicely coated. Divide the noodles onto serving plates. Garnish with the bok choy, green onions, and sesame seeds. Enjoy~!
