Begin by gathering all your ingredients. Chop the bell peppers and carrots into thin strips, and slice the green onions. Cook the lo mein noodles according to package instructions in boiling water for 3-5 minutes; drain and rinse under cold water to prevent sticking.

Heat a large skillet or wok over medium-high heat and add a splash of sesame oil. Once hot, add the diced boneless chicken breasts, cooking for 6-8 minutes until they turn golden brown and are no longer pink in the center.

Remove the cooked chicken from the skillet and set it aside. In the same skillet, add a bit more oil if needed, then toss in the chopped bell peppers, carrots, and white parts of the green onions. Stir-fry for 3-4 minutes until they become tender yet still crisp.

Return the cooked chicken to the skillet with the vegetables. Next, add your drained lo mein noodles, soy sauce, sesame oil, and the minced garlic. Toss everything together gently over medium heat for about 2-3 minutes until the noodles are heated through and well coated.

Once everything is combined and heated perfectly, transfer your Chicken Lo Mein to serving plates. If desired, drizzle with additional soy sauce for extra flavor.