1. In a large saucepan, heat oil over medium-low heat. Add onion, carrots, and garlic. Cover and cook for 5 to 7 minutes or until vegetables are nearly tender, stirring occasionally.
2. Add broth and dried basil (if using) to vegetable mixture. Bring to boiling; reduce heat. Cover and simmer for 10 minutes. Stir in kale, salt, and pepper. Return to boiling; reduce heat. Cover and simmer for 10 minutes.
3. Stir in cooked chicken, tomato, red lentils, and fresh basil (if using). Cover and simmer for 5 to 10 minutes more or until kale and lentils are tender.