Skinny Baked Mozzarella Sticks

part-skim mozzarella string cheese 1 large egg 1/4 cup flour 1/4 cup Italian seasoned breadcrumbs 1/4 cup panko breadcrumbs 2 teaspoons parmesan cheese 1 Tablespoon dried parsley Nonstick cooking spray Marinara sauce and/or Ranch dressing, for serving