Preheat And Prep: Preheat the oven to 425°F. Spray a rimmed sheet pan with cooking spray or line with parchment for easier cleanup.
Prepare the Chicken & Veggies: In a large bowl, whisk together the olive oil, lemon juice, granulated garlic, smoked paprika, cumin, coriander, cinnamon, ¾ teaspoons salt, and black pepper until smooth.
Add the chicken, tossing to evenly coat.
Add the chickpeas, red onion, carrots, and cauliflower, tossing again to coat everything evenly.
Place on the prepared sheet pan(s), spreading out in a single layer so nothing is overcrowded.
Roast: Roast for 25-30 minutes, flipping halfway, until the chicken is cooked through and the vegetables are golden and tender. Optional: run under the broiler for a minute or two at the end for extra caramelization of the veggies.
Make the Yogurt Sauce: While the chicken & veggies roasts, whisk together the Greek yogurt, lemon juice, olive oil, garlic, and salt in a small bowl.
Serve: Add the roasted chicken & veggies to a bowl and drizzle with the yogurt sauce. Serve with rice, pita, tomatoes, and lettuce if desired.