01 - Whisk together olive oil, lemon juice, garlic, cumin, coriander, paprika, turmeric, cinnamon, cayenne, salt, and pepper in a large 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 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 the prepared baking sheet or grill pan. Roast or grill for 18-20 minutes, turning once, until cooked through and lightly charred.
05 - Let chicken rest for 5 minutes to retain juices, then slice thinly against the grain.
06 - Combine yogurt or tahini, minced garlic, lemon juice, and salt. Add water gradually to achieve drizzle-able consistency.
07 - Warm pita breads, then layer with lettuce, tomatoes, cucumber, onion, and pickles. Add sliced chicken and drizzle generously with sauce. Fold and serve immediately.