Start by boiling a pot of water. Once boiling, add the lo mein noodles and cook according to package instructions until al dente. Drain and set aside.
In a small bowl, mix together the soy sauce, oyster sauce, and sesame oil. Set this flavorful sauce aside to use later.
In a large skillet or wok, heat 1 tablespoon of olive oil over medium-high heat. Add the sliced chicken breast and cook until browned and fully cooked, about 5-7 minutes. Remove the chicken from the skillet and set aside.
In the same skillet, add the remaining tablespoon of olive oil. Add the chopped onion, snow peas, shredded carrots, red bell pepper, sliced mushrooms, and minced garlic. Sauté until the vegetables are tender but still crisp, about 4-5 minutes.
Add the cooked chicken back to the skillet with the sautéed vegetables. Pour the sauce over the mixture, stirring to coat everything evenly. Finally, add the cooked lo mein noodles and toss everything together until well combined and heated through, about 2-3 minutes.
Remove from heat and garnish with sliced green onions. Serve hot and enjoy your delicious homemade Chicken Lo Mein!
