Not taste the dirt and manure, no, one should already have that sort of awareness from standard eating alone, but I could technically tell where that potato grew through a sort of... memory. [He's still not entirely sure why everyone doesn't find this power instantly awesome, because he's pretty sure it's great, but this is Rosa, and Rosa likes things like pulling swords out of her jacket so maybe...]

Okay, here, imagine a gruesome murder. A whole lot of stabbing, blood everywhere, murder weapon found but no prints or trace back to the killer. These fine tastebuds could find out the killer from the murder weapon thanks solely to nothing but a good tonguing! Pretty cool, right?

[Granted, he's only used it so far to to check if his food is locally sourced, but the potential is there!]