Molly,
I still have a lot of issues with eating and I am nearly 3 years out of treatment. I do a lot of yogurt and soft things. The radiation is really what caused the problems. Spicy food really still irritates my mouth, but I have also found creamy soups work really well. I use my blender quite a bit. My cancer center had me meet with their nutritionist, who gave me some good ideas, but that was while I was still having treatments. Maybe your center could reccomend someone for him to see. Good luck!

Female, nonsmoker, 70, diag. 5/09 after tongue biopsy: stage IV. Left hemi-gloss. and left selec. neck disec. 30 lymph nodes removed May 20. Over 7 weeks daily rads. with three chemo. PEG removed 12/4/09 Am eating mostly soft foods. Back to work 11/09 Retired 4/1/11. 7 clear scans! Port out 9/11. 2/13. It's back: base of tongue, very invasive
surgery involving lifestyle changes. 2/14: Now speaking w/Passey-Muir valve. Considering a swallow study. Grateful to be alive.