Shepherd's Pie Recipe : Alton Brown : Food Network — foodnetwork.com

Peel the potatoes and cut into 1/2-inch dice. Place in a medium and cover with cold water. Set over high heat, cover and bring to a boil. Once boiling, uncover, decrease the heat to maintain a simmer and cook until tender and easily crushed with tongs, approximately 10 to 15 minutes. Place the half-and-half and butter into a microwave-safe container and heat in the microwave until warmed through, about 35 seconds. Drain the potatoes in a and then return to the saucepan. Mash the potatoes and then add the half and half, butter, salt and pepper and continue to mash until smooth. Stir in the yolk until well combined.

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