Duchess Potatoes

Ingredients

• 5 pounds Russet Potatoes, Peeled And Boiled Until Fork Tender
• 8 whole Egg Yolks
• 1 stick Butter, Softened
• 2 teaspoons Salt, More Or Less To Taste
•  Plenty Of Black Pepper
•  1/4 Teaspoon Nutmeg (more To Taste)
• 1-1/4 cup Heavy Cream
• 1 whole Egg

Preparation Instructions:
Preheat oven to 375 degrees. Lay boiled potatoes on a baking sheet and place into the oven for 10-15 minutes, or until slightly dried on the surface.
Remove the potatoes from the oven and process potatoes through a ricer or food mill. Allow to cool in a bowl for about 5 minutes. Add egg yolks, butter, a couple of generous pinches of salt, a generous pinch of pepper, a pinch of nutmeg and 3/4 cup cream. Stir with a rubber spatula to combine. Taste and make sure the potatoes have been adequately salted.
Transfer to a large pastry bag and pipe through a large star tip in a circular/upward spiral motion.
Make an egg wash by mixing 1 egg with 1/2 cup heavy cream. Lightly brush the piped potatoes with egg wash. (This is a little easier if you chill the piped potatoes for half an hour or so.)
Bake at 375 until golden brown around the edges. Serve on a pretty platter!
Make the potatoes ahead of time and store in the fridge, then bake them at the last minute!

Source: http://thepioneerwoman.com/cooking/2011/12/duchess-potatoes/