Spicy and sour, this fermented mustard recipe is delicious slathered onto sourdough bread and served with ripe, aged cheese. It also takes only about five minutes of active time in the kitchen, and is done in three days.
Grind the mustard seeds coarsely in a spice grinder, just enough to crack them. Pour them into a pint-sized jar, and then stir in the water and starter culture.
Seal the jar tightly, and then let the mustard ferment for 3 days at room temperature.
Uncover the jar, stir in the vinegar and honey, and then it to the fridge, where it will keep about 6 months.