01 - In a large bowl, whisk olive oil, cumin, coriander, smoked paprika, turmeric, cinnamon, cayenne, garlic, salt, black pepper, and lemon juice. Add chicken thighs, toss to coat evenly, cover, and refrigerate for at least 20 minutes or up to 2 hours for optimal flavor.
02 - Rinse basmati rice under cold water until it runs clear. Combine rice, water, salt, and olive oil in a saucepan. Bring to a boil, reduce heat to low, cover, and simmer for 12 to 15 minutes until water is absorbed and rice is tender. Fluff with a fork and keep warm.
03 - Preheat a grill pan or skillet over medium-high heat. Remove chicken from marinade and cook 5 to 6 minutes per side until golden and fully cooked. Allow to rest for 5 minutes, then slice into strips.
04 - While the chicken cooks, dice cucumber, halve cherry tomatoes, thinly slice red onion, chop parsley, and cut lemon into wedges.
05 - Distribute rice evenly among four bowls. Layer with mixed greens, sliced chicken, hummus, cucumber, tomatoes, red onion, and parsley. Sprinkle sumac over vegetables if using. Serve with lemon wedges on the side.
06 - Combine Greek yogurt, lemon juice, chopped mint, salt, and pepper in a small bowl. Drizzle over bowls if desired.