Prepare the potatoes: Boil the potatoes in salted water until fork-tender. Drain and let them cool slightly before mashing them into a smooth consistency. It's best to use a potato ricer or masher to avoid lumps.
Mix the dough: On a clean surface, form a mound with the mashed potatoes. Make a well in the center and add the egg and salt. Gradually mix in the flour, kneading gently until a soft dough forms. Be careful not to over-knead, as this can make the dumplings too dense.
Shape the dumplings: Divide the dough into smaller portions and roll each portion into a long, thin rope about 1 inch (2 cm) in diameter. Use a knife to cut the ropes into small diagonal pieces, creating the signature "hoo
Cook the dumplings: Bring a large pot of salted water to a boil. Carefully drop the dumplings in, stirring gently to prevent sticking. Once they float to the surface, let them cook for another 1-2 minutes, then remove with a slotted spoon and drain.
Serve and enjoy: Serve immediately with butter, breadcrumbs, gravy, or your preferred toppings. If desired, fry leftover dumplings in a pan for a crispy variation.