I don't know that we've ever figured out how to get a baked potato. You don't get a question mark in your compendium for not having one, and the only person who has ever gotten one, we were passing the potato over and over when it happened.
I have the feeling it might have been a joke by Exterminans at the time, since no one else has ever gotten one, so far as I know.
So basically you were playing a game of Hot Potato! It's OK if I don't get one. I don't think I'll for it to be sent to me. I'm good with the information. I'm just trying to get rid of all the ?'s in my compendium and get things I've seen others have if it's possible. I think I'm finally running out of things to get! I wish there was a way to have a check system or something when we've completed plants or shows what we are missing. That may be too complicated to do.
Thanks for letting me know!