01 - Preheat oven to 425°F (220°C).
02 - In a small bowl, whisk together honey, soy sauce, minced garlic, Dijon mustard, and apple cider vinegar to make the glaze. Set aside.
03 - In a large bowl, toss carrots, parsnips, sweet potato, and red onion with olive oil, thyme, smoked paprika, salt, and pepper. Spread the vegetables evenly on a large rimmed baking sheet or roasting pan.
04 - Pat chicken thighs dry with paper towels. Rub with olive oil, salt, and pepper. Arrange chicken thighs, skin-side up, on top of the vegetables.
05 - Brush chicken generously with half of the honey garlic glaze.
06 - Roast for 25 minutes. Remove pan from oven, brush chicken with remaining glaze, and gently toss vegetables.
07 - Return pan to oven and roast an additional 15 minutes, or until chicken reaches 165°F internal temperature and vegetables are tender and caramelized.
08 - Broil for 2-3 minutes for extra browning, if desired.
09 - Rest for 5 minutes. Garnish with fresh parsley before serving.