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 bowl and turn to coat completely. Cover and refrigerate for at least 1 hour, or up to overnight for maximum flavor development.
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. Roast or grill for 18–20 minutes, turning once, until cooked through with slight charring.
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 until reaching desired drizzling consistency.
07 - Warm pita breads and fill with lettuce, tomatoes, cucumber, onion, and pickles. Add sliced chicken and drizzle generously with sauce. Roll or fold and serve immediately.