Going off the name sweetbreads I decided to go with a honey mustard sauce.
I ran the sweetbreads through the slicer on my food processor while still frozen. They looked like bonita flakes but once they defrosted they turned into a pile of mushy slime. I used a 4 oz frozen packet that I had prepared from cutting them up. I added honey, dried mustard, salt, pepper and vinegar to the still frozen sweetbread shavings and stirred it all up with a fork and left them to defrost into a pile of slime. They actually didn't taste as bad as they sound. They were fatty but had a subtle bit of gristle like texture to them. I think they would have been good with some ginger added to them as well.