1/2 cup malt vinegar
1/4 cup plain yogurt
1 tablespoon vegetable oil
salt and pepper to taste
1 teaspoon mixed spice
1/4 teaspoon freshly ground cardamom
8 skinless, boneless chicken thighs

1/2 cup tahini
1/4 cup plain yogurt
1/2 teaspoon minced garlic
2 tablespoons lemon juice
1 tablespoon olive oil
1 tablespoon chopped fresh parsley
salt and pepper to taste

4 medium tomatoes, thinly sliced
1/2 cup sliced onion
4 cups shredded lettuce
8 pita bread rounds