Place a wok or large stainless steel pan over high heat until hot.
Remove the chicken from the marinade and pay dry. Discard the marinade from the dish.
Add the oil to the wok or pan. When shimmering, add the chicken and cook for a few minutes until cooked through, 165°F. Remove the chicken from the wok or pan and set aside.
Add the onion to the wok or pan and stir-fry until softened.
Add the carrot, zucchini, broccoli, and jalapeño. Stir-fry for 1-2 minutes.
Add the mushrooms and scallions. Stir-fry for 1-2 minutes.
Add noodles and the remaining sauce and stir-fry for 3 more minutes. Then, add the chicken back to the work or pan, stir to coat everything evenly, garnish with more scallions, and serve immediately.