One of my favorite Waste Not Want Not recipes.

Homemade Potato Cakes from leftover mash potatoes. I purposely make extra mash potatoes just to make these.

Potato Cakes
2 cups mashed potatoes, cold
¼ cup flour
1 large egg
Salt and pepper
1/4 cup chives or onions, optional
1/4 cup grated cheese, optional
Flour for dredging
2 Tbsp Butter plus 2 Tbsp oil for frying
Mix cold mashed potatoes with flour, blend in egg, salt and pepper.
Mix in chives or onions if using.
Set aside for a few minutes to set.
Dredge in flour.
Over medium heat, fry in butter.

For Potato pancakes add enough sour cream, heavy cream, whole milk or canned milk to make a batter and fry.