01 - Preheat the oven to 400°F. Position the rack in the center of the oven.
02 - In a large mixing bowl, combine the olive oil, sumac, cumin, smoked paprika, coriander, kosher salt, and black pepper. Whisk until a smooth paste forms.
03 - Add the chicken thighs to the spice mixture and turn to coat evenly, ensuring the skin side is well covered. Set aside to marinate while preparing the vegetables.
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 olive oil, sprinkle with a pinch of salt, and toss to coat.
05 - Place the seasoned chicken thighs skin-side up on top of the vegetable mixture in the roasting pan.
06 - Transfer to the preheated oven and roast for 40–45 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 the chopped parsley over the dish, and serve immediately with lemon wedges alongside.