Potatoes, italian sausage, and nutritious kale get together in this yummy soup. This thick and hearty soup is the perfect meal for a brisk fall or winter evening. It makes a great lunch soup as well. Serve cups of this delicious soup along with sandwiches or a salad. Use sweet italian sausage or another mild or spicy fresh pork sausage in this flavorful potato soup. If you like to avoid red meat, make it with turkey sausage. The bacon provides a tasty garnish for the soup, but omit if you'd like. If you don't use bacon, increase the butter to 4 tablespoons. Feel free to use chopped chard leaves, escarole, or spinach in the soup if you don't have fresh or frozen kale on hand. For a creamier soup, reduce the amount of chicken stock to 3 cups and increase the heavy cream (or half-and-half) to 2 cups.