You need about 2 or 3 cups of leftover mashed potatoes. I chopped up a red onion and some cheese and threw it in. You can add anything you want at this point. Here's a few suggestions to get you started:
diced apple or pear
leftover chicken or burger
sour cream or cream cheese
Here's the important part:
once you get your mix-ins blended in, add about 1/4 cup flour and an egg. That holds the whole mess together.
Then, place small scoops in hot oil and fry. Flip after a couple of minutes.
Then, serve them to hungry babies. Josephine likes to eat hers picnic style, with sliced pears on the side. (Actually, the picnic was out of necessity. We are painting our dining room, and it's a mess.)