This is an incredibly simple recipe and produces an acceptable soup. (Acceptable because like all soups with potato in them, it tends to be a little “gloopy”.
Its barely even worth a layout:
The ingredients are (as you would expect): Leeks, potatoes, stock (vegetable or chicken- enough to cover the leeks & potatoes) and pepper (we never add salt to anything, there’s enough in the stock).
The method is: Chop the leeks & potatoes into relatively small pieces. Add the stock and cook in the slow cooker on high for about four hours. By this time everything should be soft so whizz it with a stick blender and hey presto you’re done.