Comment by jfengel

And yet he went on to include potatoes in LotR.

There's something so fundamentally European about potatoes, despite being (comparatively) new there. And British in particular. They're stodgy, bland, filling, comforting, and really tasty in a dull way. They displaced things like turnips, which had too much flavor and a dispiriting watery texture.

He could so easily have written that passage for turnips, but it would have been less comforting. (It is often read as if the word "potato" was used to translate some extinct native-European root vegetable, but I find that doubtful.)