tiny but significant

In the grand scheme of healthy eating, I bought a few sweet potatoes.
In the reality of life, one of them didn't get eaten in time. As in, it sprouted. So I left it alone. And then while cleaning up the kitchen one day, I decided to set it down in a jar of water to see if it would take root. Supposedly it's supposed to. So after a few weeks of this, nothing.  I was about to toss it and clear off some of my kitchen space when I saw it.

 From a distance, just the same old ugly sprout with no new growth in several weeks.

But up close, two budding leaves! :)

Now, I have no idea what I'm going to do with this thing. My tiny garden plot is not big enough for a potato plant, and anything I plant in the big containers will become a digging toy for Buster. Suggestions anyone?