The next part is really important: you have to wash your hands, dry them, roll up your sleeves, and mix by hand! mix well, breaking apart any potatoes that havent already been incorporated into the mixture. when you’re satisfied that the mixture is fully blended, take enough into your palm to form a small ball (no larger than two inches in diameter), and then flatten the ball into a disc. set each aside, and continue until all of the mixture has been used up. if the mixture doesnt hold together well, add some of the reserved cooking liquid.