Remove the mashed potatoes from the refrigerator. Shape the mashed potatoes into croquettes and place them on a tray.

Coat each croquette in flour, then dip in beaten eggs, and finally coat with breadcrumbs.

Place the croquettes on a tray. Heat olive oil in a skillet and fry the croquettes, turning them to brown all sides.

Drain the croquettes on paper towels. Let them cool slightly. Arrange the croquettes on a plate and serve.