Start with 1 1/2 cups mashed left over mashed potatoes. I used a a couple tablespoons more because I was using up an extra pint from the Colonials that we had.
The next step is to add a cup of rolled oats and a teaspoon of salt. Also add softened butter. Use 2T to 1/4 cup depending on how thin your potatoes are.
I used only 2T in my batch.
Mix into a dough then pat out onto a floured surface. Then using a biscuit cutter, cut out into patties. As you can see, I use a regular sized canning lid for my biscuit cutter! This works perfectly!
Fry in additional butter.
Turn over and continue frying until golden brown.