Preheat Oven to 375 Degrees Fahrenheit
Place all the cornstarch inside a large zip top bag
Season the chicken with salt and pepper and insert into the zip top bag
Close the bag and shake it until all the chicken is coated with the cornstarch
Using a pasta colander, empty the bag and shake the excess cornstarch of the chicken
Meanwhile heat 1 Tablespoon of Oil over medium heat in a large skillet
Remove the cornstarch excess from the chicken and cook in the skillet until browned on every side. Work in batches to avoid overcrowding the pan
Place cooked chicken in a large rectangular baking pan
In a bowl place all the sauce ingredients and mix until combined
Pour the sauce over the chicken and mix it throughly
Bake for 15 minutes or until the sauce thickens and chicken is completely cooked. While chicken is cooking, turn it every 5-10 minutes to make sure every side is getting coated with the sauce
Remove from oven and garnish with sesame seeds and green onion