A member of the mint family, it is a perennial plant that grows about 1 1/2 feet tall (45 cm) above the ground.
The tubers that grow underground are small and ridged. They are only about two inches long (5 cm), and white. They almost look like caterpillars or white grubs. The tubers are harvested when the leaves above ground die back. When harvesting you have to get all the tubers, even the smallest ones, or the plant will propagate wildly the following year.
It is very popular in France.
Crosne doesn’t need peeling, just scrubbing. It can be sliced raw to put into salads, or it can be cooked — in soups, sliced or puréed, roasted, fried, stir-fried or pickled.
Store out of the light (light causes them to go dark and lose flavour.)
Brought from China to France in 1882 by a physician. Named Crosne, after the home town of a Monsieur Pailleux of Crosnes.