I came across a fallen walnut tree and harvested some. Vaguely remembering from my childhood that the husk is to be removed and the nut dried in the sun I proceeded only to realize I have no idea what am I doing.
The husk doesn't separate cleanly so the process degrades to peeling like an apple skin instead of "two slashes with the knife and then drop the husk".
And I don't even know where to begin with sun-drying. Is it required (the walnuts look more mature than on the picture but were still picked before falling to the ground)? Is the sun required or can it be done in the dark? When are they ready?