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.