Are there any grains I could use instead of sticky rice for sushi, etcetera? Are there any others (preferably with more fiber/protein/general nutrition) that will stick together like that? I'm not too fussed about taste--I'm sure I can cope. I just want something that works.
Maybe millet. It is not as sticky as sticky rice, but is a nice whole grain. Also,
consider adding gluten (maybe wheat gluten) to make a grain more sticky. (I not so
sure how this will taste, but I think it would be something I would at least try.)
I would suggest millet as long as you cooked it in enough water to get it sticky, and maybe barley, or oat groats?