4 pita bread rounds
1 tablespoon olive oil
4 skinless, boneless chicken breast halves - chopped
2 medium onion, chopped
1 clove garlic, minced
1 (10.75 ounce) can tomato puree
ground cumin to taste
salt to taste
ground black pepper to taste
1/2 cup butter, melted
1 cup Greek yogurt
1/4 cup chopped fresh parsley