In 3 1/2- to 4-quart slow cooker, layer carrots, garlic, chicken, fennel and beans. Sprinkle with salt and pepper. Pour broth and water over top. Stir to combine.
Cover; cook on Low heat setting 6 to 8 hours.
About 20 minutes before serving, stir tortellini, spinach, onions and basil into chicken mixture. Increase heat setting to High. Cover; cook 15 to 20 minutes or until tortellini are tender. Sprinkle individual servings with Parmesan cheese.