Preheat oven to 400 degrees F. Place
sweet potatoes in a pot and cover with water. Bring to a simmer
and cook until tender, approximately 15 - 20 minutes. Heat milk
and butter in a small saucepan. Keep warm. Drain cooked potatoes
well. Press through a mill or ricer, place in mixer bowl. Add
milk / butter mixture, egg yolks and nutmeg. Season with salt
and pepper. Mix until well incorporated. Place cooked sweet
potato slices on a lightly oiled baking sheet. Transfer sweet
potato mixture to a pastry bag with a large star tip. Pipe sweet
potato mixture onto sweet potato slices. Bake Duchesse Sweet
Potatoes at 400 degrees F until golden brown (about 15 minutes)
Transfer to a warm serving plates or a platter.
