Heat oven to 400°F. Lightly spray olive oil spray in a medium nonstick skillet and heat on a medium heat. Add onion, garlic and cilantro and saute about 2 minutes, add ground turkey, salt, garlic powder, cumin and cook meat for 4 to 5 minutes until meat is completely cooked through. Add 1/4 cup of tomato sauce and 1/2 cup of chicken broth, mix well and simmer on low for about 5 minutes. Combine cooked rice and meat together. Cut the bell peppers in half lengthwise, and remove all seeds. Spoon 2/3 cup meat mixture into each pepper half and place in a 9 x 13-inch baking dish. Top each with 1 tbsp cheese. Cover tight with aluminum foil and bake for about 45 minutes. Carefully remove the foil and serve right away.