In a mixing bowl, combine the soy sauce, honey, minced garlic, grated ginger, and red chili flakes. Whisk until well blended and set aside.
Toss the bite-sized chicken pieces in cornstarch until evenly coated.
Heat vegetable oil in a large skillet or wok over medium-high heat. Add the coated chicken in a single layer and cook for 6-8 minutes until golden brown.
Pour the sauce over the chicken and stir gently to coat. Allow to simmer for 1-2 minutes until the sauce thickens.
Cook the noodles according to package directions, drain well, and toss with a little oil to prevent sticking.
Add the cooked noodles to the skillet with the chicken and toss gently until coated in sauce.
Garnish with chopped green onions and sesame seeds if desired. Serve immediately.