Cook the Noodles: Bring a large pot of salted water to a boil. Cook the chow mein noodles according to package instructions, usually 3–4 minutes. Drain, rinse with cold water, and set aside.

Prepare the Sauce: In a small bowl, whisk together soy sauce, oyster sauce, hoisin sauce, sesame oil, and chicken broth. Set aside.

Cook the Chicken: Heat 1 tablespoon of vegetable oil in a large skillet or wok over medium-high heat. Add the thinly sliced chicken breast and season lightly with salt and pepper. Stir-fry for 4–5 minutes until fully cooked and slightly golden. Remove the chicken from the skillet and set aside.

Cook the Vegetables: Add the remaining 1 tablespoon of vegetable oil to the skillet. Toss in garlic and ginger, stirring for 30 seconds until fragrant. Add the cabbage, carrots, bell pepper, and onion. Stir-fry for 3–4 minutes until the vegetables are tender but still crisp.

Combine Chicken and Sauce: Return the cooked chicken to the skillet with the vegetables. Pour in the prepared sauce and stir well to coat everything evenly.

Add Noodles: Add the cooked noodles to the skillet and gently toss them with the chicken and vegetables until everything is well combined and heated through. Sprinkle chopped green onions on top.

Serve and Enjoy: Remove from heat and serve immediately. Enjoy this delicious Chicken Chow Mein on its own or pair it with steamed rice for a heartier meal.