Parmesan Encrusted Mashed Potatoes

Ingredients:

3 pounds boiling potatoes, peeled
Kosher salt
1 1/2 cups milk
6 tablespoons unsalted butter
1/2 cup sour cream
1/2 teaspoon freshly ground black pepper
1/4 cup grated Parmesan
2 Tablespoons plain bread crumbs
Directions:

Preheat the oven to 400 degrees F. Coat a 13 by 9 by 2-inch baking dish with 1 tablespoon of butter and set aside.

Cut the potatoes into 1-inch cubes and place them in a large pot. Cover the potatoes with cold water and add enough salt so the water tastes quite salty. Bring to a boil, then lower the heat and simmer, uncovered, for about 10 to 12 minutes, until the potatoes fall apart easily when pierced with a fork.

Meanwhile, heat the milk and butter in a small saucepan, making sure it doesn't boil. Set aside until the potatoes are done.

As soon as the potatoes are tender, drain them in a colander. Return to pot and mash. As soon as the potatoes are mashed, slowly whisk in enough of the hot milk/butter mixture to make the potatoes very creamy. Add 2 teaspoons of salt and the sour cream and pepper and whisk to combine. Taste for seasoning and serve hot.

Transfer the potatoes to the prepared baking dish. Stir the bread crumbs, salt and fresh ground pepper and remaining 1/4 cup of Parmesan in a small bowl to blend. Sprinkle the bread crumb mixture over the mashed potatoes. Recipe can be prepared up to this point 6 hours ahead of time; cover and chill.

Bake, uncovered, until the topping is golden brown, about 20 minutes - longer if refrigerated.