Boil a large pot of salted water. Add the lo mein noodles and cook according to package instructions until al dente. Drain and set aside.
In a bowl, marinate the sliced chicken with soy sauce, oyster sauce, sesame oil, minced garlic, and grated ginger for about 15 minutes.
In a large skillet or wok, heat 1 tablespoon of vegetable oil over medium-high heat. Add the broccoli, bell peppers, and snap peas. Stir-fry for 4-5 minutes until they are tender but still crisp. Remove vegetables from the pan and set aside.
In the same skillet, add the remaining tablespoon of vegetable oil. Add the marinated chicken and cook for about 5-7 minutes, stirring frequently until the chicken is thoroughly cooked and slightly golden.
Once the chicken is cooked, add the stir-fried vegetables back into the skillet. Then add the cooked lo mein noodles and toss everything together, making sure the noodles are evenly coated with the sauce.
Add salt and pepper as desired, adjusting the flavors to your preference. Stir everything together for another minute to heat through.
Remove from heat and garnish with chopped green onions.
Notes
Feel free to customize the vegetables based on your preference.