01 - Set oven temperature to 425°F.
02 - Combine carrots, parsnips, red onion, and baby potatoes in a large bowl. Drizzle with 1 tablespoon olive oil, season with ½ teaspoon salt and ¼ teaspoon pepper, then toss to coat evenly.
03 - Spread vegetables in a single layer in a large roasting pan or ovenproof dish.
04 - Pat chicken thighs dry. In a small bowl, mix minced garlic, rosemary, thyme, lemon zest, smoked paprika, remaining salt, pepper, and 1 tablespoon olive oil to form a paste.
05 - Rub herb paste thoroughly under the skin and over the surface of each chicken thigh.
06 - Place chicken thighs skin-side up among the vegetables in the roasting pan.
07 - Pour chicken broth around vegetables, avoiding contact with chicken skin.
08 - Roast in oven for 40 to 45 minutes, until skin is golden and crispy and internal temperature registers 165°F.
09 - Broil briefly at the end for extra crispy skin, if desired.
10 - Allow to rest for 5 minutes before serving alongside pan juices and vegetables.