01 -
In a large bowl, combine the leftover mashed potatoes, grated Parmesan cheese, finely chopped green onions, and flour. Add the egg, garlic powder, onion powder, salt, and pepper. If desired, incorporate the chopped parsley. Mix thoroughly until well blended and the mixture holds together.
02 -
Scoop approximately 1/4 cup of the potato mixture and form into compact patties with your hands. Ensure they are firmly pressed to maintain structural integrity while cooking. Continue until all mixture is shaped.
03 -
Heat olive oil or melt butter in a large skillet over medium heat until hot but not smoking.
04 -
Place potato cakes in the skillet without overcrowding to ensure even cooking. Fry for 4-5 minutes per side until golden brown and crispy.
05 -
Remove cakes from the skillet and transfer to a plate lined with paper towels to absorb excess oil.
06 -
Serve warm, optionally garnished with additional grated Parmesan cheese. Enjoy as a side dish or savory snack.