Post Espohogeal Cancer diet for great Nutrition ?

My hisband had espohogeal Cancer, chemo, sucessful surgery, and follow up chemo and immunotherapy now. He eats pretty well, but now Doc suspects stricture in his throat and that they can do the dialations - which I found good info on in another discussion.
He's down to his high school weight but doesn't want to lose any more. I'm wondering if anyone has worked with a nutritionist who understands what is really needed and possible to get optimal nutrition (not just adding fat and sugar which is mostly what I'm finding). He can eat most things, but avoids anything to rough. He loves bread but it seems to cause problems some of the time. To make things easier to his sytem to absorb, we've been choosing more vegetarian protiens. We'd love to learn from your wisdom!