Prep all ingredients ahead. Dice chicken, zest orange, mince garlic and ginger.
In a bowl, season chicken with salt and pepper. Toss with 3 tbsp cornstarch until evenly coated.
Heat 2 tbsp olive oil in a skillet over medium-high heat. Sear half the chicken, ~4 mins per side until golden. Repeat with remaining chicken.
Whisk together all sauce ingredients in a bowl.
Turn off heat. Pour sauce into hot skillet. It will bubble and thicken quickly. Stir to deglaze.
Return chicken to pan. Toss to coat in thickened sauce. Serve immediately with rice or noodles.