why soak potatoes in water
More starch is removed from a cut potato than a whole peeled potato, because a greater surface area is exposed on cut potatoes. Soak them in cold water for as long as a few hours to remove more starch than by rinsing alone. You'll notice cloudiness and starch at the bottom of the bowl. Change the water occasionally, rinsing in between, to eliminate any starch sediment that might settle on the potatoes.