01 - Preheat oven to 400°F. Line a large baking sheet or roasting pan with parchment paper if desired.
02 - In a large mixing bowl, combine the olive oil, sumac, cumin, smoked paprika, coriander, salt, black pepper, and lemon juice. Whisk until a smooth, fragrant paste forms.
03 - Add the chicken thighs to the marinade and toss thoroughly to coat all surfaces evenly. Allow to rest at room temperature for 10 minutes to absorb the flavors.
04 - Spread the carrot sticks, sliced red onion, drained chickpeas, and minced garlic across the prepared baking sheet. Drizzle lightly with additional olive oil and toss to coat.
05 - Nestle the marinated chicken thighs skin-side up on top of the vegetable and chickpea mixture, ensuring even spacing across the pan.
06 - Roast in the oven for 35 to 40 minutes, until the chicken skin is golden and crisp and the internal temperature registers 165°F. The carrots should be tender and the chickpeas slightly caramelized.
07 - Remove from the oven and sprinkle generously with chopped fresh parsley. Serve hot alongside rice, warm flatbread, or a crisp green salad.