Den Backofen auf 180°C vorheizen.
Pat the chicken dry with paper towel (this helps the skin crisp up).
Mix olive oil or butter with garlic, salt, pepper, paprika, and herbs.
Rub the mixture all over the chicken, including under the skin if possible.
Place lemon halves and onion inside the cavity of the chicken.
Place chicken in a roasting dish. Add optional vegetables around it if using.
Roast for 1 hour 15 minutes to 1 hour 30 minutes, depending on size.
Baste the chicken with pan juices every 30 minutes for extra flavour and moisture.
Check doneness by piercing the thickest part of the thigh; juices should run clear.
Rest for 10–15 minutes before carving.