Mix together the pork and marinade ingredients and set aside for 5-10 minutes while you prepare the other ingredients.
Heat a tablespoon of oil in a wok over high heat. Add the pork stir-fry until browned. Turn down the heat, remove the pork from the wok and set aside. Add a couple more tablespoons of oil to the wok and sautee the mushrooms for about 2 minutes using medium heat. Break up the noodles gently with your hands and add them to the wok.
Add the soy sauces and sugar. Stir-fry everything together until the noodles get an even, deep brown color. If you’re not seeing the color you want, add a little more dark soy sauce.
Add the leafy greens now and mix in with the noodles until wilted. Serve hot! Some people like to add a few drops of Chinese black vinegar right before eating—totally up to you.