- Mash the boiled potatoes in a large bowl until smooth. Add salt, cornstarch, and any optional seasonings like black pepper, garlic powder, or Parmesan cheese. Mix well. 
- Take small portions of the mixture and shape them into cylindrical or round croquettes. 
- Dip each croquette into the beaten eggs, then roll in breadcrumbs until fully coated. 
- Heat oil in a deep pan over medium heat. Fry the croquettes in batches for about 2-3 minutes per side, or until golden brown and crispy. 
- Remove and drain on paper towels. Serve hot with your favorite dipping sauce.