Is this a potato? And would it be safe to eat it?!

in Fruit & veg
I grabbed what I thought was an empty flowerpot in the garden, but when I emptied out the compost in it, I found these little dears! I do remember cutting off some sprouting eyes from some potatoes in the vegetable cupboard, and sticking them in a pot to see what might happen ( I’d just been watching The Martian! ) I stuck them out on the patio, and a couple of spindly plants grew, but it was very late in the season, and they died down fairly quickly. And of course I didn’t label them! The question is, can I be fairly certain they are tiny potatoes, and can I risk eating them? I’m fairly excited at the thought of having accidentally grown some food, and couldn’t bear to throw them out!
I know they are only tiny, the clothes peg is for size comparison. Thoughts gratefully received, thanks.
I know they are only tiny, the clothes peg is for size comparison. Thoughts gratefully received, thanks.

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thanks again, I’ll post back when I’ve eaten them!