Add the kielbasa, Hurst's Lentils (including the Garlic & Herb seasoning packet included in the bag), potato, and water. Note, for a thick stew, use 8 cups of water, or, up to 10 cups of water if you prefer a thinner soup. Bring to a boil, reduce heat and simmer the stew, stirring it occasionally, for about 35 minutes or until the lentils and potatoes are tender.