Cut boneless chicken breasts into chunks. Season with salt and pepper. Dip chicken in cornstarch and then in egg. Fry in a little oil until brown but not cooked through. Place in a single layer in a baking dish. Mix sauce ingredients (below) together and pour over chicken.
Bake for one hour at 325°. Turn chicken every 15 minutes. If you like extra sauce, make another batch of sauce and bring it to a boil on the stove top. Stir constantly and let cook over medium heat until thickened and reduced, about 6-8 minutes.