Ingredients:

  Amount  Measure       Ingredient -- Preparation Method
--------  ------------  --------------------------------
   8                    prune plums
     1/2  cup           plus 2 tablespoons sweet butter
   1      tablespoon    ground cinnamon
     2/3  cup           plus 8 teaspoons sugar
   2      tablespoons   butter
   1 1/2  cups          all-purpose flour
   1 1/2  cups          diced cold potatoes made from cooked
                        -- potatoes
     3/4  teaspoon      salt
   2                    eggs
   3      quarts        boiling water
     2/3  cup           ground walnuts

Preparation:

1. Remove pits from plums by pushing pit through stem end with a crochet hook or skewer. 2. Mix 1/2 cup (1 stick) softened butter with cinnamon and 8 teaspoons sugar. 3. Fill plums with mixture; chill. 4. To make pastry, cut remaining butter into flour until mixture resembles coarse crumbs; combine flour mixture with potatoes and salt. 5. Mix in eggs and knead well. (Dough will be sticky.) 6. Roll out on floured board to 1/4-inch thickness; cut into 3-inch squares. 7. Place a plum in center of each square; moisten edges and pinch together firmly to enclose plum. 8. Dip hands in flour; roll filled dough into smooth round ball in palms of hands. 9. Gently drop 2 dumplings at a time into 3 quarts of gently boiling water; cook 20 minutes and drain. 10. Roll in remaining sugar mixed with walnuts; place on platter. Cover; keep warm in oven. Serve hot.