There are soy based products.I found the blocks at Michael's Craft Store. I bought that also- for a change in using the goat's milk based one.
I LOVE making my own mustard because I can adapt it to our specific taste preferences. You can really play around with it... honey for sweet... hot sauce for a little spice. Possibilities are endless
So great! Hopefully I can make a nice honey mustard soon my Honey will enjoy! Thanks for the tip on the soy blocks, would be a great thing to try once we ar elow on soap :)