In a saucepan combine - cornstarch, water, sugar, ginger, garlic powder, vinegar, soy sauce, pepper. Let simmer ( make sure to stir frequently) - it will thicken a bit.
Place chicken in a greased baking dish and pour half the sauce over the chicken. Make sure all sides of the chicken have sauce on them.
Bake till done. Brush with the rest of the sauce.
Serve and Enjoy
Recipe by Budget Savvy Diva at https://www.budgetsavvydiva.com/2012/05/baked-teriyaki-chicken-recipe/