Question: how vodka is made from potatoes?
Answer: Potatoes are just one thing from which vodka is made. The basic recipe is “cook it, mash it up (puree it), add water and then yeast, and let it ferment for a week or two.” So, bake or boil your potatoes, puree them, add some water, add yeast. Yeast turns starch into alcohol, the resulting “soup” will be 5~10% alcohol.