Do you still have some leftover mashed potatoes? Try turning them into mashed potato pancakes! You could even change them up and use sweet potato pancakes too! Just change the seasoning to brown sugar and cinnamon and top with a little apple butter! Hmmm! I think I just changed my own mind :-)
Combine potatoes, eggs, flour and seasonings; mix well. In a medium skillet, heat oil over medium-high heat. Add pancake size dollops of potato mixture. Cook until bottom is crispy. Flip and brown other side. Serve with butter and sour cream.