Cook the noodles in boiling water according to package directions until just tender. Drain and set aside.

In a small bowl, whisk together soy sauce, honey, minced garlic, and red chili flakes (if using).

Toss the chicken slices with a little cornstarch if you want a thicker sauce and slightly crispier texture.

Heat the vegetable oil in a large skillet or wok over medium-high heat.

Add the chicken and cook until browned and cooked through, about 5–7 minutes.

Pour the sauce mixture over the chicken and let it simmer briefly until it thickens slightly and becomes glossy.

Add the cooked noodles to the skillet and toss everything together so the noodles are well coated in the sticky sauce.

Drizzle sesame oil over the noodles if using and toss again.

Remove from heat and garnish with sliced green onions and sesame seeds.

Serve hot.