Molly Goldberg Jewish Cookbook
POTATO KNISHES6 tablespoons shortening  2 onions, chopped  4 cups mashed potatoes  3 eggs  3/4 cup sifted flour  1 teaspoon salt  1/8 teaspoon white pepper  2 tablespoons grated onionMelt 4 tablespoons of the shortening in a skillet.  Add the chopped onions.  Saute for 10 minutes, stirring frequently.  Remove the onions and cool.  Preheat the oven to 375 degrees.  Melt the remaining shortening in the skillet.  Mix together the potatoes, eggs, flour, salt, pepper, grated onion and melted shortening.  Knead until smooth.  Break off pieces and shape into 2-inch balls.  Make a depression in the center of each, and fill with a teaspoonful of the sauteed onions.  Cover the filling with the dough.  Flatten the balls slightly with the palm.  Place on a greased baking sheet.  Bake in a 375 degree oven for 25 minutes, or until browned.  Chopped liver may be substituted for the onions, if desired.