Would someone tell me how to make pure whiskey at home with a vegetable, sugar, water, and yeast?!

Would someone tell me how to make pure whiskey at home with a vegetable, sugar, water, and yeast?

I heard a proffessor talking about making whiskey pure at home by, if I recall, putting a potato or corn cob in a bag with sugar and submerging it for a week or two, then removing the vegetable and submerging again the rot and sugar mixture for a couple weeks. If done incorrectly or not properly mixed afterwards, it could be fatal, which is why I'd like to know for sure what the steps are if anyone could point me in the right direction. I'm not looking to make a distillery, I just want to know if it can be done so simply. I have heard prisoners do the aformentioned and put the bag deep inside the toilet bowl, but the next family reunion is some time away and I would like to hear from someone else who has done this before.
Much obliged.

Its a two stage process. Ferment potatoes, grain or whatever to make an alcohol. You then ferment the alcohol. The process is pretty much the same whether its vodka, gin, whisky or brandy that you're trying to make.

Keep in mind that home fermentation is illegal in the United States for two main reasons. First, the government taxes spirits. Second, fermentation is a skilled process and many people have gone blind or have been killed by drinking home fermented spirits. Only the middle part of the fermented liquid is safe. The first part (the foreshots and heads) and the last past (the tails) are dangerous. The skill is knowing when the flow of distillate has passed the heads and not reached the tails.