Preheat air fryer to 375F.

Cut chicken into 1-inch cubes. Mix together with whisked egg until all chicken is coated.

In a large plastic bag, add the cornstarch. Using tongs, take chicken pieces out of the egg mixture, allowing excess egg to drip off and add to the bag.

Close the bag and shake chicken pieces around until fully coated by the cornstarch. Remove pieces from the bag and place on the cutting board that you used to cut up your chicken.

Coat the side of the chicken facing up very well with cooking spray. Add the chicken, sprayed side down, to the basket of your air fryer. Now spray the side facing up, so all sides of chicken are coated.

Air fry at 375F for 10-15 minutes, or until chicken is slightly browned and cooked through.

As the chicken cooks, make the sauce in a medium-sized skillet. Whisk sauce ingredients together and cook over medium heat, stirring constantly, until the sauce thickens–about 5 minutes.

Toss cooked chicken with sauce and serve immediately.