Potato Leek Soup is a traditional dish. On a chilly day, nothing beats a bowl of hearty potato soup. It’s also simple! There’s no need for cream; purée the soup to make it thick and creamy. Nothing beats a warm bowl of potato soup as the weather cools down. The classic potato leek soup is simple to make and delicious. Because of their sulphur components, leeks provide similar health benefits to garlic and onions. Allicin is a sulphur chemical that works to neutralize free radicals. As a result, leeks have a lot of antioxidants in them.