01 - Preheat the oven to 400°F (200°C).
02 - Pat the chicken dry with paper towels. Rub the entire surface, including under the skin if possible, with olive oil, salt, black pepper, thyme, rosemary, and paprika.
03 - Place the halved garlic bulb, quartered onion, halved lemons, and several lemon slices into the chicken cavity.
04 - Place remaining lemon slices and any leftover garlic around the chicken in the roasting pan. Add chopped carrots and potatoes if using.
05 - Tie the chicken legs together securely with kitchen twine and tuck the wings underneath.
06 - Roast in the preheated oven for 1 hour and 15 minutes, basting once or twice with pan juices, until the skin is golden and a meat thermometer inserted into the thickest thigh reads 165°F (75°C).
07 - Remove the chicken from the oven and let it rest for 10 minutes before carving. Serve alongside roasted vegetables and pan juices.