Instead of soaking the mustard seeds in the traditional wine, beer or vinegar, choosing whey or pickle brine (such as from making dill pickles) introduces the health benefit and keeping qualities of lactic acid bacteria into your condiment.
I have a mustard-lover in my house. He eats mustard with everything. So I like to make my own, in volume, a quart at a time. It’s so easy, not to mention inexpensive, that there’s really no sense in buying it.
The spicy sweet combination in this is fanstastic and can be easily adjusted to taste. Tastes great with chips, veggies or meats. Can it, freeze it, add a little more oil and you've got a wonderful salad dressing.