This article is from the Food Preserving FAQ, by Eric Decker firstname.lastname@example.org with numerous contributions by others.
Q: I intend to eat the nuts from my two eight year pistachio trees. By
now the nuts are growing. Does somebody knows how to get those crispy,
salty pistachios from the nut in the tree? Manuel Lopez Mateos
from H. B. Ghoddusi , rec.food.historic
1 - Once you take the nuts from the tree, first get rid of the peel (the
2 - Let them dry in sun (needs longer time and you need to have enough
sunny days) or in oven (it is faster but be careful to avoid
3 - Make a bowl of brine (not very concentrated) up 3-4% should be alright.
4 - Put the pistachios in a pan and heat it over a cooker until browning
and bumping starts. Keep on low heating for a while in this stage.
5 - Add the brine (not soak the nuts, just make them wet) and keep on
heating while stirring until the nuts become dry again, while the salt
is crystallized over them.
P.S: I have never tried this procedure for pistachio, but I have done it
several times with different seeds and it works very well.