For some reason I could never make potato pancakes from leftover mashed potatoes.But when I tried this recipe in 2007 Taste of Home Cookbook, that was sent to them from Marlene Harguth of Maynard Minnesota I knew I had found a winner. This recipe was made as written,but I think it would be really good with some finely chopped onion and some ground black pepper. I recently made this again and added what was optional onion, now the onion isn't optional. It's much better with the onion. Submitted to "ZAAR" on February 9th, 2009.