You forgot “marinate in cold buttermilk for at least an hour if not four”.
DO NOT SALT or brine the liver.
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Never have marinated it, but I might try that. You are correct about the salt.
I recommend, instead of salt (applied only after cooking) to use Tony Chachierie’s Cajun Salt.
I’ve tried deep-fried liver strips, too.
They always seemed a bit chewy to me.