Placki Ziemniaczane (Potato Pancakes)

Grate 1 kg of starchy potatoes and one onion on the fine side of a box grater. Put the mixture in a towel and squeeze out as much liquid as you can into a bowl. Let that liquid settle for a few minutes, pour off the water and add the potato starch left at the bottom back to the potatoes. Mix in an egg, two tablespoons of flour and salt. Fry spoonfuls flattened to 1 cm in a good layer of hot oil until deep brown on both sides. Serve them right away with sour cream, or with goulash.