겨자즙 Mustard sauce
Mustard sauce can be used as a seasoning for vegetables and fermented salads.
Mix 1 part mustard powder to 2 parts warm water (about 40º℃/104ºF).
Let it stand for about 1 hour at room temperature to begin fermenting, or in a warm steaming pot for 10 minutes.
Fermented mustard is spicier than raw mustard.