In your baking pan, mix all marinade ingredients. Add chicken and coat well.
Place one onion half cut-side down. Insert 2 skewers about 2 inches apart.
Thread chicken onto skewers (alternate thigh + breast).
Top with second onion half. Place back in pan.
Bake at 400°F (200°C) for about 1 hour, basting. Add ½ cup water once or twice if needed.
Meanwhile, whisk tahini ingredients until smooth.
Toss onion salad ingredients together.
Slice shawarma thinly. Fill pita with chicken, onion salad, and pickles.
Brush pita with drippings/paste. Pan-toast on medium heat until crispy on all sides.
Finish with tahini and pomegranate molasses. Enjoy.
