Groninger Mustard Soup Recipe

An american acquaintance once reacted with shock when he heard of this soup for the first time: 'wow, is that similar to stone soup?' he quipped, referring of course to the famous fairytale by the brothers grimm. It's not hard to see his point who first thought of making a soup from a condiment anyway? At any rate, this regional specialty from groningen is delicious, and that's all that counts. Our heartfelt thanks go to mr. Boom for sharing his recipe with us.