In a large mixing bowl, combine the chicken pieces and cornstarch, tossing to evenly coat.
Heat the vegetable oil in a frying pan or wok over medium-high heat. Once hot, carefully add the chicken pieces in batches, frying until they are golden brown and cooked through, about 5-7 minutes per batch. Remove and drain on paper towels.
In the same pan, combine the soy sauce, honey, rice vinegar, sesame oil, minced garlic, and grated ginger. Stir well and bring to a simmer over medium heat, allowing the sauce to thicken for about 3-4 minutes.
Add the fried chicken pieces to the pan with the sauce, tossing to coat evenly.
Once the chicken is well coated, sprinkle the sesame seeds over the top and toss gently again.
Serve the sesame chicken hot, garnished with chopped green onions. It pairs well with rice or steamed vegetables.
For extra flavor, consider marinating the chicken in soy sauce for 20-30 minutes before breading and frying.
If a spicier version is desired, you can add red pepper flakes to the sauce.
Leftovers can be stored in the refrigerator for up to 3 days; reheat before serving.