01 - Preheat 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. Whisk until a smooth paste forms.
03 - Add the chicken thighs to the bowl and turn to coat evenly, working the spice mixture under and over the skin for thorough coverage.
04 - Spread the sliced carrots, drained chickpeas, red onion, and minced garlic in a single layer across 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 during roasting.
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 chopped parsley over the dish, and serve immediately with lemon wedges alongside.