01 - Preheat the oven to 400°F. Position the rack in the center.
02 - In a large mixing bowl, combine the olive oil, sumac, cumin, smoked paprika, coriander, salt, and black pepper. Stir until a smooth paste forms.
03 - Add the chicken thighs to the bowl and turn to coat each piece thoroughly in the spice mixture, ensuring even coverage under the skin.
04 - Scatter the sliced carrots, drained chickpeas, red onion, and minced garlic across the bottom of a roasting pan or large baking dish. Drizzle lightly with additional olive oil, season with a pinch of salt, and toss to combine.
05 - Place the seasoned chicken thighs skin-side up on top of the vegetable and chickpea bed, allowing the juices to baste the vegetables as they roast.
06 - Roast for 40 to 45 minutes, until the chicken skin is deeply golden and crisp, the internal temperature reaches 165°F, and the carrots are fork-tender.
07 - Remove from the oven, scatter fresh parsley over the top, and serve immediately with lemon wedges alongside.