Raised potato donuts or Spudnuts are soft and airy donuts made by adding mashed potatoes, which makes a soft and tender dough.
Dissolve yeast is the 1/2 cup warm water.
In a medium sauce pan combine milk, shortening, salt, sugar, mashed potatoes and heat to lukewarm. Set aside.
Pour into the bowl of an electric mixer and add beaten eggs and dissolved yeast. Add the lemon juice, lemon zest and nutmeg. Add 3 cups flour and beat until smooth. Add remain flour 1 cup at a time to make a soft but firm dough. Cover and let rise until double in bulk.
Punch down the dough and divide in half. Roll out 1/2-inch thick and cut with a doughnut cutter. Cover with a cloth and let rise until double for about 30-40 minutes.