01 - Set the oven to 425°F.
02 - Remove giblets from the cavity if present and pat the chicken dry with paper towels.
03 - Rub the exterior and interior with olive oil, then season evenly with salt, pepper, smoked paprika, thyme, rosemary, and cumin.
04 - Fill the cavity with half of the onion, lemon halves, and 3 garlic cloves.
05 - Scatter the remaining onion, carrots, celery, and garlic in a roasting pan. Position the chicken breast-side up atop the vegetables.
06 - Tie the legs together with kitchen twine and tuck the wings beneath the body.
07 - Pour chicken broth or water into the pan bottom if using, to maintain moisture.
08 - Cook for 1 hour 20 minutes or until juices run clear and an internal temperature of 165°F is reached at the thickest thigh part.
09 - Allow the chicken to rest for 10 to 15 minutes before carving. Serve alongside roasted vegetables and pan juices.