Wow. My brother bakes and you do gardening. I only wish I can be good at both. :D
You have really good and helpful friends. Out of everything you wrote only Yacon stood out to me. I only know sweet potato and have yet to taste yacon. We have some locally but I haven't seen any supermarket selling it. Or maybe I'm just not looking. Haha.
We don’t have them here. You should really try it, if you have the chance ;0)