Preheat your oven to 375°F (190°C). Cut the chicken into bite-sized pieces.

In a small bowl, whisk the egg with water. In another bowl, place the cornstarch. Coat the chicken in the egg mixture, then roll it in the cornstarch. Place on a baking sheet lined with parchment paper.

Bake the chicken for about 15 minutes on the top half of the oven or until cooked through.

Prepare the sauce by combining all sauce ingredients except cornstarch and water. Bring to a low boil, stir to combine, then add cornstarch mixed with water.

Once chicken is cooked, move to the bottom third of the oven and turn to low broil. Cook for 5-10 minutes until light brown and crispy.

Add the cooked chicken to the saucepan and coat in the sauce. Serve immediately.