Peel and slice your potatoes in half. Partially cook them either by cooking them in boiling water for about 6 minutes, or microwaving them for 5-8 minutes, until softened slightly but still firm.
Allow potatoes to cool slightly. Then grate them using a box grater or shredder.
In a large bowl, combine shredded potatoes, egg, flour and salt. Mix well.
Line a baking sheet (or large plate/platter that will fit in your freezer) with parchment paper. Divide the batter roughly into 8, and form 8 patty shapes on the parchment paper. Place in the freezer and freeze for 45 minutes to 1 hour.
Fill a large skillet with about 1/4 inch of oil. Fry the frozen patties in batches until golden brown, about 5 minutes per side. Move them a paper towel lined plate or cooling rack and sprinkle with salt.
Serve the patties hot, or reheat in a 450 oven or air fryer. Alternatively, after freezing the patties flat, you can store them in a zip lock in the freezer for up to 6 months,