Whisk together the cornstarch and cold water; add in the sugar, soy sauce, vinegar, garlic, ginger, and white black pepper. Heat in a small saucepan over low heat. Let simmer; stirring frequently until sauce thickens and comes to a boil.
Wash and pat dry chicken pieces. Place on a sprayed baking sheet. Brush the chicken with the sauce and turn the chicken tenders over; brush again.
Bake for 30 minutes; turn the pieces over and bake another 10-15 minutes, or until done.
Brush the chicken pieces with the sauce every 10 minutes.