Ya, ORC, that doesn't work, either. I said to fill the bag. I showed him a two cup measure. He is a keeper but has his limitations. His willingness to run almost any errand for me, fills my gas tank, picks up feed and shavings with just a mention, so I can stay home and work on my projects and play with my critters more! Smooches, dh!
So, you will have to post your hybrid mustard recipe here if it works out.
Here is the report on the bean paste.......YUMMY!!!!

I had a plate of tortilla chips with goat cheddar melted on them, topped with a mound of bean paste and a dab of sour cream.....mmmmmmm! Wish I had some tomatoes and/or guacamole, but it was still a good lunch. DH liked it, too.
But the beans were like a creature from another planet. Opening the jars today was quite an event, I told dh that I wish we'd filmed it and posted it on youtube, it was that amusing. I loosened the bales, just lifted them, and the beans started oozing out in earnest.....think of a soda bottle that you dropped and are trying to open without making a mess, so you just loosen the cap a bit and let some pressure out.....but soda oozes or squirts out anyways. I got about a cup of beans that I was able to rescue and put in a bowl, just from the escaping paste. It was like toothpaste coming out at high pressure, with the occasional spit from one of the jars.
I finally loosened the bales completely by placing a papertowel over the jar (to keep escaping beans sanitary and usable) and covered that with a kitchen towel in case the jar broke....it didn't. I had to wipe down the jars and wash the lids and gaskets once everything settle down. They are behaving themselves now in the fridge.
I WILL make this recipe again and again....I will just allow for LOTS of headspace, not just an inch! And maybe relieve the pressure partway through to avoid this issue.