Prep chicken: Season chicken with cumin and coriander.
Combine vegetables: In a large bowl, combine onions, garlic, chickpeas, tomatoes, bell peppers, red
pepper flakes (if using), lemon zest, and juice of 1 lemon. Season with salt and pepper.
Roast vegetables: Spread the vegetable mixture in a large roasting pan. Spray with cooking spray. Roast for 15 minutes.
Add chicken: Nestle the chicken breasts into the vegetables. Roast for an additional 20 minutes, or until the chicken is cooked through.
Add spinach: Add spinach to the pan and roast for 5 more minutes, or until wilted.
Make yogurt sauce: While the chicken roasts, combine Greek yogurt, parsley, and remaining lemon zest. Season to taste.
Serve: Toss spinach into the vegetables. Squeeze juice from a few tomatoes into the pan. Garnish with parsley. Serve hot with the yogurt sauce and lemon wedges for squeezing.
Tips:
Make it ahead: You can prepare the vegetables and marinate the chicken in advance.
Add variety: Feel free to add other vegetables to this dish, such as zucchini, eggplant, or mushrooms.
Spice it up: Adjust the amount of red pepper flakes to your desired spice level.