The fall begs cooks to return to their stoves and prepare an array of warm and comforting meals. Rustic potato and leek soup is simple and delicious. Only a handful of ingredients is needed for this dish and it can prepared in 30 minutes. Chunks of potato and leeks are cooked butter and simmered in chicken stock until they become soft and mellow. You can choose to leave the soup chunky or puree it with a blender. For a vegetarian/vegan version of this soup, use vegetable stock instead of chicken stock.