Prepare chicken: Whisk together the Chicken Marinade ingredients in a medium bowl (soy sauce, sesame oil, cornstarch, pepper). Add chopped chicken and toss to coat evenly; set aside.
Lo Mein Sauce: Mix the sauce ingredients together; set aside.
Prepare noodles: For pre-cooked lo mein noodles, run them under hot tap water to separate, then drain well and toss with a drizzle of toasted sesame oil. For uncooked noodles, cook them in a large pot of boiling water until al dente, rinse with cold water, drain thoroughly, then toss with a drizzle of toasted sesame seed oil. Stir fry the chicken: Heat the oil in a large braiser, large stainless steel pan, or wok over medium-high heat. Sear the chicken until deeply golden on each side, then stir-fry until cooked through. Remove the chicken to a plate. Sauté aromatics: Heat another drizzle of oil in the pan. Add the WHITE parts of the green onions and sauté for 1 minute. Add the garlic and ginger, and stir fry for 10-15 seconds.
Stir fry vegetables: Add the bell pepper, cabbage, and carrots and stir fry for 1 minute, adding another drizzle of oil if needed.
Add noodles: Add the noodles and sauce, and stir fry for 1 minute by tossing the noodles with tongs. Add sprouts: Add the chicken, bean sprouts, snow peas, and the chopped tops of the green onions and toss to combine.
Adjust to taste: Make it saltier with additional soy, spicier with chili sauce, sweeter with brown sugar, etc., until it’s perfect for YOU!