Gather all your ingredients. Chop bell peppers, carrots, and green onions. Cook lo mein noodles in boiling water for 3-4 minutes, drain and rinse, and set aside.

Heat a skillet or wok over medium-high heat and add sesame oil. Sauté sliced chicken for 6-8 minutes until golden brown and cooked through.

In the same skillet, add more sesame oil if needed. Stir-fry bell peppers, carrots, and green onions for 3-4 minutes until vibrant and slightly tender.

Return cooked chicken to the skillet with vegetables. Add lo mein noodles, soy sauce, minced garlic, and sesame oil. Toss for 2-3 minutes until heated through.

Transfer to serving plates, drizzle with additional soy sauce if desired, and serve hot.