01 - Whisk together olive oil, lemon juice, minced garlic, cumin, coriander, paprika, turmeric, cinnamon, cayenne pepper, salt, and black pepper in a large mixing bowl until thoroughly combined.
02 - Add chicken thighs to the marinade, turning to coat completely. Cover and refrigerate for at least 1 hour, up to overnight for maximum flavor penetration.
03 - Preheat oven to 425°F or heat a grill pan over medium-high heat.
04 - Arrange marinated chicken on a foil-lined baking sheet or grill pan. Cook for 18-20 minutes, turning once halfway through, until chicken reaches internal temperature of 165°F and develops slight char.
05 - Remove chicken from heat and let rest for 5 minutes to retain juices. Slice thinly against the grain.
06 - Combine Greek yogurt or tahini, minced garlic, lemon juice, and salt in a small bowl. Whisk in water 1 tablespoon at a time until reaching desired drizzling consistency.
07 - Warm pita breads briefly. Fill with lettuce, tomatoes, cucumber, red onion, and pickles. Add sliced chicken generously and drizzle with sauce. Roll or fold pita and serve immediately.