Note: The topping is delicious on chicken, lamb chops, or fish, such as halibut, swordfish, or mahimahi.
Preheat oven to 350°.
Pour 2 tablespoons oil in a 13 x 9-inch baking dish.
Place bread in a food processor; pulse until coarsely ground. Combine breadcrumbs, parsley, cheese, sugar, salt, pepper, and garlic in a shallow dish. Place flour in a shallow dish. Combine egg whites and egg in a shallow dish.
Dredge 1 chicken breast half in flour; shake off excess flour. Dip in egg mixture; dredge in breadcrumb mixture. Place in prepared dish. Repeat procedure with the remaining chicken, flour, egg mixture, and breadcrumb mixture. Drizzle 1 tablespoon oil over chicken. Bake at 350° 20 minutes or until the chicken is done.