In a large Dutch oven, heat oil over medium-high heat. Add sausage; cook until browned and crumbly. Add onion, celery, and garlic; cook, stirring occasionally, until tender, about 5 minutes. Add all potatoes, and cook for 2 minutes. Stir in broth, tomato, and thyme, and bring to a boil. Reduce heat, and simmer until potatoes are tender, about 20 minutes. Stir in kale, salt, and pepper, and cook for 5 minutes. Sprinkle servings with cheese.
Recipe by Paula Deen Magazine at https://pauladeenmagazine.com/sausage-and-sweet-potato-soup-recipe/