In a large mixing bowl, combine olive oil, Greek yogurt, minced garlic, cumin, coriander, turmeric, paprika, cinnamon, black pepper, salt, and lemon juice. Mix until well combined.
Add the chicken thighs to the marinade, ensuring they are thoroughly coated. Cover and marinate in the refrigerator for at least 1 hour (or up to overnight for deeper flavor).
Preheat your grill or stovetop grill pan over medium-high heat. Remove chicken from the marinade and place on the grill.
Grill the chicken for about 6-7 minutes per side until fully cooked and juicy, reaching an internal temperature of 165°F (75°C). Remove from heat and let rest for 5 minutes before slicing.
While the chicken is resting, assemble the bowls. Place a scoop of cooked quinoa at the bottom of each bowl.
Top the quinoa with diced cucumber, halved cherry tomatoes, sliced red onion, and chopped parsley.
Slice the grilled chicken and arrange it on top of the quinoa and vegetables.
Drizzle with tahini sauce and serve with warm pita bread on the side.
Notes
Serve bowls with a sprinkle of additional parsley on top for color, and offer lemon wedges on the side for an extra squeeze of freshness.