In a bowl, combine the soy sauce, honey, minced garlic, grated ginger, and red chili flakes (if using) to create a flavorful sauce.
Coat the bite-sized chicken pieces with cornstarch, ensuring each piece is evenly covered to achieve a sticky, crispy texture when cooked.
Heat the vegetable oil in a large skillet or wok over medium-high heat until it reaches a suitable temperature for frying the chicken.
Add the coated chicken to the skillet and cook for approximately 6 to 8 minutes, stirring occasionally, until the chicken is golden brown and fully cooked through.
Pour the prepared sauce over the cooked chicken and stir thoroughly to ensure all pieces are coated. Allow the sauce to simmer for 2 to 3 minutes until it thickens and becomes sticky.
While the sauce simmers, cook the noodles according to the package instructions until they are tender. Drain and set aside.
Incorporate the cooked noodles into the skillet with the sticky chicken, tossing well to evenly distribute the sauce and chicken throughout.
Garnish with chopped green onions and sesame seeds (if using) for a fresh finish and extra flavor before serving hot.