Step 1: Necessary Items to have
3 Pickling Spices
5. A pot for boiling your tongue.
6 Some sort of a sealable container to store your tongue in.
Step 2: The Tongue
The tongue should soft and supple, and the first thing you may notice is the very rough texture of the skin of the tongue. It is much more rough than say your or my tongue.
Step 3: Cook It and Clean it
Next you want to peel the skin off the tongue. It is kind of rubbery in feel and should come off easily given you have cooked it all the way. I note that it is important that you get all the skin off. The first reason being that, well, I think it would be gross to eat rough cow tongue skin, and second it will hinder in the pickling process.