Pre-heat oven to 400 degrees F.

Saute diced onion until golden brown. In medium bowl, combine mashed potatoes, sauteed onion, eggs, margarine, salt, pepper, and matzoh meal.

Form mixture into small balls about the size of a walnut. Brush with diluted egg yolk. Place on a well-greased baking sheet and bake for 20 minutes or until well browned.

Note: This recipe is easily doubled. For more flavor, substitute some mashed sweet potato for the regular kind. A ration of about 2 parts russet potato to 1 part sweet potato works well.

Courtesy of FabulousFood.com