Potato soup is one of those universally popular comfort foods with a zillion variations. There are creamy, chunky, bisque, loaded-baked style, one's with bits of pork, potato soup to satisfy a vegetarian....Made with or without dairy...half&half provies even more richness. Can be seasoned with herbs or spices. Toppings abound....cheese, crisped potato skins, bacon bits...Potato soup can be rich enough to stand alone with only needing a salad to complete a meal. Served cold as an appetizer is another option. What's your secret to a killer potato soup?