At two weeks post treatment sounds like he is doing great! I still can't eat most fruits, acid burns, no taste. Bread I couldn't eat for a year or so. It was a texture thing, the same with potatoes. To save time, money I went to a buffet a few times, and tried most everything, if I liked it, I then made/ate in the future. I think tasting most everything can also help it getting some taste buds back due to memory, but there is other involvement too.
