Addendum

Space yams are potatoes with a creamy filling, by the way. As for Earth yams, those will die out for easily understandable economic reasons.

Rank Hypocrisy

People get all worked up about turkey and potatoes in vaguely medieval fantasy, but they never say anything about coconuts, and when you break open the coconut there's a spirit inside that gives you magic armor that's obviously just power armor and the spirt becomes your sassy copilot. Can you believe these people?