Place a large skillet on medium-high heat. Add a thin layer of oil – just enough to cover the surface of the pan (about 3 tablespoons).
Pour the cornstarch into a large bowl, and sprinkle on the salt and pepper.
Add your chicken pieces into the bowl and toss until all chicken is well coated.
Place the coated chicken into the hot pan, spreading it out so it’s in an even layer.
Continue cooking the chicken, stirring occasionally, until it is cooked through and turns a golden brown.
While chicken is cooking, whisk together all remaining ingredients in a small bowl for the sauce.
Once chicken has completed the cooking process, remove it from the pan, place it on a plate and set aside.
Pour the sauce mixture into the hot skillet and allow it to simmer until it thickens slightly. Use a wooden spoon to scrape up any brown bits stuck to the pan to incorporate into the sauce.
Turn off the heat, add the chicken back into the pan, and toss it lightly to completely coat each piece in the sauce.
Garnish with sliced fresh green onions, toasted sesame seeds and even a little extra orange zest if desired. Serve with steamed rice and broccoli.