6-8 grape leaves, 1/4 cup rice, 1/2 cup water, 1 tablespoon olive oil, 1/2 onion (finely chopped), 1 garlic clove (minced), 1/2 teaspoon ground cumin, 1/2 teaspoon ground coriander, 1/4 teaspoon ground cinnamon, salt and pepper to taste, 1/4 cup chopped fresh parsley, 1/4 cup chopped fresh mint, 1/4 cup Greek yogurt, 1 tablespoon lemon juice