Make the sauce by combining the soy sauce, dark soy sauce, oyster sauce, sugar, water, and MSG.
Heat the neutral oil in a pan over medium-high heat.
Add the shallots/onion and sauté until fragrant and translucent.
Add the shiitake mushrooms and sauté until cooked through.
Add the pan-fried noodles and the sauce. Toss to coat the noodles evenly.
Add the scallion whites and bean sprouts. Toss to combine.
Serve the noodles, garnished with the scallion greens and optional chili crisp.
