My friend makes up a batch of quinoa and has it for breakfast with milk and raisins or dried apricots. She cooks enough for a few days, and it's filling. I don't know of any high fiber bread although Udi's whole grain bread has some teff in it, which does have some fiber.
If you take stuff to work, how about hummus? You can make it with black beans too. It makes a good spread on the less fibrous GF breads.
Also, GF oats, from Bob's Red Mill or from a couple of places online. I'm struggling with the same thing, but quinoa and fruit and veg are my staples as I have to be careful of beans and corn. Good luck! :)
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