Congrats on finishing! Your taste buds will be back to normal on....the day they're back to normal. Not to sound flippant, but they will come back at their own pace. Some folks have returned to normal within a month or so (not many) some have taken over a year.

I'm 10 weeks out of radiation, and I have about 60% of my taste back, for the first 4 or 5 mouthfuls. Ater that, they kind of fade away. I didn't have a PEG, so not only did I deal with the pain of swallowing thoughout radiation, I did it to swallow cardboard. The first time I could actually taste anything was reason to celebrate!

There's really nothing that you can do to speed things up other than keep trying different things, and do it every day. All of a sudden, you'll have that " hey, I can taste..." nirvana.
Good luck!
Wayne