Kale is a popular soup ingredient with Portuguese cooks from Gloucester to New Bedford and Provincetown. If unavailable, substitute spinach.
Combine potatoes and water in soup kettle and simmer, partially covered, 15 minutes or until tender. Meanwhile, saute sausage in heavy skillet over low heat until brown. When potatoes are tender, mash in kettle with remaining water. Drain sausage and add to kettle with kale. Cover and simmer 10 minutes. Season with salt and pepper.