Scrub potatoes, peel, and grate them with box grater or food processor.
Add potatoes to large bowl and mix with egg, flour, and salt.
Heat a large frying pan (we love cast iron) over medium heat and pour a bit of oil to cover the bottom of the pan.
Spoon about two tablespoons of potato mixture into the pan, flattening the rounds so they aren't too thick and fry both sides until golden brown.