Availability is a challenge, so if you see crosnes at the farmers’ market, by all means buy them. They are amusing and deliciously fun to cook. Look for pale, pearly, firm tubers from late fall to early winter. Because they begin to deteriorate shortly after they are dug up, they must be used right away. Firmness is key. Even if they are more beige than ivory, they will be fine as long as they are firm.
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