Boil potatoes until tender, then mash in a bowl.

Add grated cheese, chopped green onions, salt, and pepper to the mashed potatoes and mix well.

In a separate bowl, beat the egg.

Form small balls from the potato mixture, about 1 inch in diameter.

Dip each ball in the beaten egg, then roll in breadcrumbs to coat.

Heat oil in a frying pan over medium heat.

Fry the potato balls in batches until golden brown, about 3-4 minutes.

Remove from oil and place on paper towels to drain excess oil.