Looks like giant Jerusalem artichokes, which, when I've had them, are only a couple inches long tops. The hated Wiki says that the typical example is 2-3.9" long, which would be the range of yours.My best guess would be "an old crosne.
Looks like giant Jerusalem artichokes, which, when I've had them, are only a couple inches long tops. The hated Wiki says that the typical example is 2-3.9" long, which would be the range of yours.My best guess would be "an old crosne.