Welcome to OCF!  Glad you have found the forum to help you with your recovery questions.
Here is a list of easy to eat foods which are great for patients who are relearning to eat after rads.  Its all about texture when you have a very sensitive mouth.  If you arent already using it ask your doc for a prescription for magic mouthwash to help numb your mouth so you can eat without so much discomfort. 
Easy to Eat Foods List Rinsing with 16 oz warm water, 2 tsp baking soda and 2 tsp salt can be helpful.  Try rinsing at least 4 times daily.  A water pic (on the lowest setting) with peridex can also help your mouth feel better.  Some members have rinsed with seltzer water.  I couldnt handle the carbonation.  I still cant drink soda.
Hang in there, you will get there it just seems to take way too long.