Soak the salt cod in cold water overnight.
After soaking, simmer the salt cod in boiling water for about 15 minutes.
Drain the fish and allow to cool to almost room temperature.
When the fish is cool, flake it apart with a fork into small pieces.
In a sauté pan, over medium heat, melt the butter.
Add the onions and cook until softened.
Add the flaked fish, along with the mashed potatoes, egg, pepper and savory.
Mix together until well combined; form into small cakes and roll in flour.
Fry the fish cakes in canola oil, over medium heat, until golden brown on both sides.
Serve with scrunchions, if desired.