Preheat oven to 325 degrees F, grease a 9x13-inch baking dish and set aside.
Cut chicken breasts into bite-sized pieces and season with salt and pepper.
Place cornstarch and slightly beaten eggs in separate bowls.
Dip the chicken into cornstarch first and then coat in the egg mixture.
Heat oil in a large skillet over medium-high heat and cook chicken until browned.
Place the chicken in the baking dish.
In a medium bowl, whisk together brown sugar, orange juice, sriracha, apple cider vinegar, grated orange peel, white vinegar, soy sauce, garlic salt, and cornstarch.
Pour over chicken and bake for 1 hour. Stir the chicken every 15 minutes to fully coat.
Cool a few minutes in the pan before plating to allow the sauce to thicken.
Notes
Yes, you read that correctly, dip first in the cornstarch and then in the egg mixture. Also, don't be alarmed when your browning the chicken, the texture will change.