Combine the mashed potatoes, cheese, onions, egg and flour.
Pat the potatoes into 10 patties. (this is usually easier if the mixture is cold)
In a separate bowl combine the bread crumbs and seasoning
Place each mashed potato pancake in the breadcrumbs and lightly press down.
To Cook:
Stovetop: heat a large skillet over medium heat. Add just enough oil to cover the bottom. Cook the pancakes 2-3 minutes on each side until golden brown. Place on paper towel lined plate.
Air Fryer: Spray with oil. Cook in the air fryer for 2 minutes, flip and cook another 2-3 minutes.
Notes
If frozen, cook on the stovetop 4-5 minutes or air fry for 4 minutes, flip, and continue cooking 2-3 minutes.