It is old, but potato alone will get you pretty far: https://www.livescience.com/10163-man-eating-potatoes-2-months.html https://www.livescience.com/10163-man-e

It is old, but potato alone will get you pretty far: https://www.livescience.com/10163-man-eating-potatoes-2-months.html https://www.livescience.com/10163-man-eating-potatoes-2-mont... I'd need some variety just so I didn't go insane.