01 - Preheat 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, salt, and black pepper. Whisk until a smooth paste forms.
03 - Add the chicken thighs to the bowl and turn to coat each piece thoroughly, ensuring the spice mixture covers all surfaces and gets under the skin.
04 - Scatter the sliced carrots, drained chickpeas, red onion, and minced garlic into a roasting pan or large baking dish. Drizzle lightly with olive oil, sprinkle with a pinch of salt, and toss to combine evenly.
05 - Place the seasoned chicken thighs skin-side up on top of the vegetable mixture, spacing them apart so the skin can crisp properly.
06 - Transfer to the oven and roast for 40 to 45 minutes, until the chicken skin is deeply golden and the internal temperature reaches 165°F, and the carrots are fork-tender.
07 - Remove from the oven, scatter the chopped parsley over the top, and serve immediately with lemon wedges alongside.