In a large Ziploc bag, combine cornstarch, salt and pepper. Add chicken pieces and shake to coat evenly.
½ cup cornstarch, ¾ teaspoon fine sea salt, ¼ teaspoon freshly ground black pepper, 3 cups boneless skinless chicken breasts
Heat vegetable oil in a large skillet over medium-high heat.
3 tablespoons vegetable oil
Working in batches if necessary, add coated chicken to the skillet in a single layer. Cook until golden brown and crispy on all sides, about 7 to 8 minutes. Transfer to a paper-towel lined plate.
Reduce heat to medium-low and carefully pour sauce into the skillet. Bring to a simmer and cook for 2-3 minutes until it begins to thicken.
Return chicken to the skillet and toss to coat in the sauce. Cook for an additional 2 to 3 minutes, stirring occasionally, until chicken is glazed and sauce has thickened.
Garnish with sliced green onions or sesame seeds and serve hot over steamed rice, if desired.
green onions, sesame seeds