Jerusalem artichoke
US /dʒəˈruːsələm ˈɑːrətʃoʊk/
UK /dʒəˈruːsələm ˈɑːrətʃoʊk/

1.
a North American sunflower with edible tubers, cultivated as a vegetable.
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We harvested a large crop of Jerusalem artichokes from the garden.
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Roasted Jerusalem artichokes make a delicious side dish.