Unless you know 100% that Chef TJ is at GF Cafe on your day then I would cancel your ADR. I have never had such a bad allergy experience at any WDW restaurant.
I was at GF Cafe. We've also been to Park Fare and they were ok but did tell me a few things were safe that I was pretty sure weren't like the nestles chic chip cookies. My nut allergy is not severe so I was fine but Park Fare also was not as careful as other buffets. I'm severely allergic to beans and mainly ate from the kids buffet because there weren't great options for me and some that were seemed to have shared spoons and they didn't have another pan ready in the back. I think they do share a kitchen though. I would hope TJ being there things have improved.
I wonder if he knows he's a ROCK STAR ???!! --Katie