01 - Set oven to 400°F to ensure proper roasting temperature.
02 - Arrange onion slices and carrot chunks evenly across the bottom of a large roasting pan to create a vegetable base for the chicken.
03 - Rub the entire chicken surface with olive oil, then coat evenly with kosher salt, black pepper, and fresh lemon zest.
04 - Fill the chicken cavity with halved lemons, garlic bulb halves, and fresh thyme sprigs to infuse aromatic flavors during roasting.
05 - Tie the legs together securely with kitchen twine and tuck the wing tips underneath the body to promote even cooking.
06 - Place the chicken breast-side up directly on top of the vegetable bed in the roasting pan.
07 - Roast for 1 hour 10 minutes, basting with pan juices once or twice during cooking, until juices run clear and internal temperature reaches 165°F when measured at the thickest part of the thigh.
08 - Let the chicken rest for 10 minutes to allow juices to redistribute throughout the meat before carving.