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Mashed-Potato Gratin

Mashed-Potato Gratin

Everyday Food, December 2004 http://www.marthastewart.com/313311/mashed-potato-gratin
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  • Prep Time 10 minutes
  • Total Time 1 hour
  • Yield Serves 8

Ingredients

    • 3 tablespoons butter, plus more for baking dish
    • 3 pounds russet potatoes, peeled and chopped
    • Coarse salt
    • 3 large egg yolks
    • 1 1/4 cups milk
    • 1 1/2 cups coarsely grated Gruyere, Jarlsberg, or other Swiss cheese (6 ounces)

Directions

  1. Preheat oven to 400 degrees. Butter a shallow, 1 1/2-quart baking dish. In a large pot, cover potatoes with water by 1 inch; add 1 tablespoon salt. Bring to a boil; reduce heat. Simmer until easily pierced with a paring knife, about 20 minutes. Drain. Wipe pan; return potatoes.
  2. Add butter; mash with a potato masher until creamy. Cool slightly. Fold in egg yolks, milk, 1 1/4 cups cheese, and 2 teaspoons salt. Spread in prepared dish.
  3. Top with remaining cheese. Bake until golden brown in spots, rotating dish halfway through, about 30 minutes.

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