01 - Preheat oven to 400°F. Line a large rimmed baking sheet or roasting pan with parchment paper.
02 - In a large mixing bowl, whisk together the olive oil, sumac, cumin, smoked paprika, coriander, salt, black pepper, and lemon juice until well combined.
03 - Add the chicken thighs to the bowl and toss thoroughly to coat each piece evenly in the spice mixture. Let marinate at room temperature for 10 minutes for deeper flavor penetration.
04 - Spread the carrot sticks, sliced red onion, chickpeas, and minced garlic across the prepared baking sheet. Drizzle with a light coating of olive oil and toss to coat.
05 - Nestle the marinated chicken thighs skin-side up on top of the vegetable mixture, ensuring even spacing across the pan.
06 - Roast for 35 to 40 minutes until the chicken skin is golden and crisp and the internal temperature registers 165°F. The vegetables should be tender and the chickpeas slightly caramelized.
07 - Remove from the oven, scatter chopped parsley over the top, and serve hot alongside steamed rice, warm flatbread, or a crisp green salad.