I tried roasting cashews twice. The first time i added tamari sauce (just a savoury soy sauce) and roasted them. The tamari got a little burned but overall the taste was good.
Except the nuts were not cripsy of crunchy, not rubbery per se but just not the expected 'brittle-nes' of roasted nuts.
Next time I was inspired by this and this receipe, to soak the nuts in salty water with some lemon juice prior to draining, seasoning and roasting them. (Which again added both flavour and moisture to the nuts) The nuts tasted good but were not crispy.
How do i get my oven-roasted cashews salty and crispy?
EDIT: Tried the same with almonds with similar results. Soaked them for 2 hours in water, lemon juice and tamari sauce (soy-sauce). Then roasted them for 25 mins at about 150degrees. Taste good but no crisp.