The walnut harvest in Europe starts in October; the Californians send their uniform, high quality crop a little later.
When walnuts are farmed on any scale, as they are in parts of France like the Dordogne, the nuts are gently dried in huge ovens to make sure they will keep. A wet walnut is simply one that has not been dried.
Walnut oil has a rich walnut flavour and a high level of healthy fats to recommend it.
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