Can I dehydrate chicken cooked in water, purreed and mixed with purreed vegetables and mashed potatoes. Like a stew. Something that would be crisp like a chips then dissolve easily when eaten. All precooked. Blended then dehydrated. This is for someone that struggles with swallowing and it needs to be tender and soft. Can you mix things like that?
1 - Get the paste flat and very thin
Use what's available: pastry machine; wide, flat icing tip; jerky "gun"
Make sure the paste has as little water as possible when preparing, different methods will require different amounts of water
2 - Dehydrate it
Use a home dehydrator or look up home oven dehydrating articles on jerky or fruit leather
You can just dehydrate baby food. That's what we did when taking babies canoe camping (no electricity, no ice, and jars/bottles/cans are not allowed, and even if you brought them, the weight would kill you, and partial jars can't be refrigerated.)
We own a home dehydrator and some teflex sheets for making fruit leather. We just spread a jar of pureed baby food onto the teflex and dried it. We didn't trying handing it to a baby to eat - we reconstituted it with a little boiling water and let it cool - but you could certainly try it.
I think doing this with one jar would let you know if it's a viable technique or not without investing a whole lot of effort and mental energy into the process. If you're going to be doing it for a while (because you know it works) then making the puree yourself would become a useful plan.