Step 1

In a glass baking dish, mix together the malt vinegar, 1/4 cup yogurt, vegetable oil, mixed spice, cardamom, salt and pepper. Place the chicken thighs into the mixture and turn to coat. Cover and marinate in the refrigerator for at least 4 hours or overnight.

Step 2

Preheat the oven to 350 degrees F (175 degrees C). In a small bowl, mix together the tahini, 1/4 cup yogurt, garlic, lemon juice, olive oil, and parsley. Season with salt and pepper, taste, and adjust flavors if desired. Cover and refrigerate.

Step 3

Cover the chicken and bake in the marinade for 30 minutes, turning once. Uncover, and cook for an additional 5 to 10 minutes, or until chicken is browned and cooked through. Remove from the dish, and cut into slices.

Step 4

Place sliced chicken, tomato, onion, and lettuce onto pita breads. Roll up, and top with the tahini sauce.