8 large Idaho potatoes          3 T. olive oil
 3 eggs                          1/2 c. freshly grated Parmesan cheese
 Salt to taste                   2 T. all-purpose flour
 3 T. butter, melted             1 egg yolk, lightly beaten
 Butter 8-inch cake pan with removable bottom.  Fill large saucepan
 two-thirds full with water, add potatoes, bring to a boil. Boil gently
 until potatoes are tender.  Preheat oven to 350 degrees F.(175C).
 Peel and mash potatoes while hot.  Beat 3 eggs with salt in large
 bowl.  Beat in melted butter and oil. Add mashed potatoes, Parmesan
 cheese and flour; mix well.  Put potato mixture into buttered pan and 
 smooth top with spatula.  Brush top with beaten egg yolk.  Bake 20 to
 25 min. or until top is golden.  Unmold potato cake and place on a 
 warm platter.  Serve immediately. Makes 6 to 8 servings.