A walnut is the nut of any tree of the genus Juglans. Walnuts are rounded stone fruits.
The removal of the husk reveals the wrinkly walnut shell. The shell enclosed the kernel.
When the nut is ripe, it has a green fibered outer shell, a very hard, light brown, two piece inner shell with the eatable,very wrinkled kernel inside.
The kernel is protected against oxidation by a thin, brown skin .
In 1938, The Grenoble walnut was awarded the "AOC Appelation d'Origine Contrôlée", it means that the quality is strictly controlled and then the European "Protected Designation of Origin (PDO) .
The AOC walnut must be from the franquette, the mayette ot the parisienne variety.
The PDO ensures that the walnuts are produced according to the traditional "savoir faire".
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