In electric blender or food processor, crush cereal into fine crumbs. Add garlic powder, basil, lemon peel, cheese and margarine. Place in shallow pan or plate. Set aside.
In small bowl, combine yogurt, salt, pepper, lemon juice and ketchup. Coat fish with yogurt mixture then, cereal mixture, covering completely. Place in single layer, on shallow baking pan coated with cooking spray or foil lined.
Bake at 375°F about 10 minutes. Turn fish. Bake 10 minutes longer or until fish flakes. For food safety, the internal temperature of the fish should be a minimum of 145ºF. Serve hot garnished with chopped parsley.