In reply to tehmarks:
> I've decided to go all-in with a mushroom experiment too
I got a kit for Christmas, which has been pretty simple to look bring on (though also, with The Last of Us in mind, slightly creepy) - possibly a bit of a short-lived novelty, though, unless I can get the little mycelial block to spread into something else after a couple of rounds of sprouting. Possibly one can just leave a couple of caps to spore into some virgin compost.
For herbs, I'd also back Basil, with the caveat that in the warmer months it does seem prone, at least in my experience, to aphid infestations when on a windowsill.