01 - 
                Throw the mashed potatoes, cheddar, scallions, egg, and 3 tablespoons of flour into a big mixing bowl. Stir until everything's blended well.
              
              
              
                02 - 
                Use your hands to shape the mixture into 12 even portions. Roll them into tight balls, then press each one into a thick, flat circle (about half an inch).
              
              
              
                03 - 
                Pour the remaining 1/2 cup of flour into a shallow plate. Coat each pancake completely in the flour before cooking.
              
              
              
                04 - 
                Pour 3-4 tablespoons of vegetable oil into a big frying pan and set it on medium heat. Make sure the oil is spread out to cover the bottom of the pan.
              
              
              
                05 - 
                Work with a few at a time. Fry each pancake till both sides are crispy and browned, about 3-4 minutes for each side. Don’t pack them in the pan, and resist flipping them too soon.
              
              
              
                06 - 
                Once cooked, move the pancakes onto a plate lined with paper towels. Sprinkle salt over the top right away and serve with sour cream and a garnish of extra scallions if you'd like.