2 cups plain yogurt
1/4 cup distilled white vinegar
1/4 cup olive oil
3 tablespoons lemon juice
3 cloves garlic, minced
1/2 teaspoon ground cinnamon
1/2 teaspoon ground nutmeg
1/2 teaspoon dried oregano
2 bay leaf
3 1/2 pounds boneless leg of lamb, trimmed of fat, and cut into thin strips
2 tablespoons olive oil

8 (8 inch) pita bread rounds
2 tomatoes, thinly sliced
1 onion, thinly sliced
1/2 bunch fresh mint leaves