whole roasting chicken, about 1.5 to 2 kg • kosher salt • medium waxy potatoes, peeled and cut into quarters • smoky paprika • garlic powder • Italian seasoning • ground black pepper • medium carrots, peeled and roughly chopped • celery sticks, roughly chopped • parsnip, peeled and roughly chopped • large onion, roughly chopped • garlic cloves, unpeeled •