In a large pot, heat olive oil and add sausage
Brown sausage halfway then add celery, carrots, onion, mushrooms, and garlic
Continue browning until onions are tender and meat is completely cooked
Add the sweet potato and sauté for another minute
Add crushed tomatoes, ½ tsp salt, pepper, Italian seasoning, and mix well
Add broth and 2 cups of water then bring to a simmering boil for 15-20 minutes or until sweet potatoes are tender
Add the tortellini and cook according to package directions
Add chopped spinach and serve
