Mash the boiled potatoes in a medium bowl until smooth. Let cool slightly.
Add the egg, Parmesan cheese, flour, and chopped spring onions. Season with salt and pepper.
Mix everything until well combined and shape into small patties (about 2 tablespoons of mixture each).
Coat each patty in breadcrumbs, pressing gently to help them stick.
Heat oil in a skillet over medium heat.
Fry the patties for 2–3 minutes on each side or until golden brown and crispy.
Transfer to a paper towel-lined plate to drain excess oil.
Serve warm with sour cream, yogurt dip, or your favorite sauce.