01 - Preheat the oven to 425°F.
02 - Pat the chicken dry with paper towels. Rub skin and cavity with olive oil, salt, and black pepper. Stuff cavity with lemon halves, smashed garlic, rosemary, and thyme.
03 - In a large roasting pan, toss carrots, parsnips, potatoes, and red onions with olive oil, salt, and pepper. Arrange vegetables evenly.
04 - Place the chicken breast side up on top of the vegetables in the roasting pan.
05 - Pour chicken broth or wine into the pan around the vegetables to add moisture and flavor.
06 - Roast for 1 hour 15 minutes, until skin is golden and an instant-read thermometer registers 165°F in the thickest thigh area.
07 - Halfway through roasting, toss vegetables and baste chicken with pan juices.
08 - Let rest for 10 minutes before carving. Serve alongside the roasted vegetables.