Creating Chicken Chow Mein is made easy when you follow these steps:

1. Cook Noodles: Prepare the chow mein noodles according to package instructions. Drain and set aside.
2. Heat Oil: In a large skillet or wok, heat the vegetable oil over medium-high heat.
3. Cook Chicken: Add the sliced chicken to the skillet, seasoned with salt and pepper. Cook until the chicken is no longer pink, approximately 5-7 minutes. Remove from the skillet and set aside.
4. Stir-Fry Vegetables: In the same skillet, add broccoli, bell peppers, carrots, and garlic. Stir-fry for about 3-4 minutes until the vegetables are tender-crisp.
5. Return Chicken: Add the cooked chicken back into the skillet with the vegetables. Mix everything well.
6. Add Sauce: Pour in the soy sauce, oyster sauce, and sesame oil, stirring until evenly coated.
7. Thicken Sauce: Stir in the cornstarch mixture, and cook for an additional 1-2 minutes until the sauce thickens.
8. Combine Noodles: Add the cooked chow mein noodles to the skillet, tossing everything together until well combined and heated through.
9. Garnish: Sprinkle with chopped green onions before serving.

Following these steps will guide you in creating an incredible Chicken Chow Mein dish effortlessly.