01 - Whisk together olive oil, lemon juice, garlic, cumin, coriander, paprika, turmeric, cinnamon, cayenne, salt, and black pepper in a large bowl until fully combined.
02 - Add chicken thighs to the bowl and turn to coat thoroughly. Cover and refrigerate for at least 1 hour, up to 12 hours for optimal flavor penetration.
03 - Preheat oven to 425°F or heat a grill pan over medium-high heat. Line a baking sheet with foil if roasting.
04 - Arrange marinated chicken on prepared baking sheet or grill pan. Cook for 18-20 minutes, turning once halfway through, until internal temperature reaches 165°F and edges are slightly charred.
05 - Transfer chicken to a cutting board and let rest for 5 minutes. Slice thinly against the grain for maximum tenderness.
06 - Combine Greek yogurt, 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 each with lettuce, tomatoes, cucumber, red onion, and pickles. Top with sliced chicken and drizzle generously with sauce. Fold or roll and serve immediately.