Mashed Potato Casserole

TIME
40 minutes, plus 30 to 40 minutes’ baking

YIELD
12 to 14 servings

INGREDIENTS
14 tablespoons unsalted butter, softened, and more for the pan
6 pounds russet or Yukon Gold potatoes, peeled and cut into chunks
2 tablespoons plus 1 teaspoon kosher salt
1 1/2 cups sour cream
1 teaspoon black pepper
6 tablespoons finely chopped chives
2/3 cup bread crumbs
2/3 cup grated Parmigiano-Reggiano cheese

As a vegan, I use Earth Balance instead of the butter, Tofutti sour cream and vegan cheese.

PREPARATION
Lightly grease a 9-inch-by-13-inch baking pan.
In a large pot, bring the potatoes, 4 quarts water and 2 tablespoons salt to a boil. Boil potatoes until fork tender, about 20 minutes. Drain.

Mash potatoes with 10 tablespoons butter, sour cream, 1 teaspoon salt and the pepper. (If you have a food mill or ricer, now is the time to use it; push the potatoes through and then gently combine them with the butter, sour cream, salt and pepper.)

Mash in the chives. Taste and adjust seasoning, if necessary. Spread potatoes into the prepared pan. At this point you can cover and refrigerate for up to 3 days, but it is best to avoid chilling mashed potatoes if you can.

In a small bowl, combine the remaining 4 tablespoons butter, bread crumbs and cheese. Mix together until it forms coarse crumbs. Crumbs can be refrigerated for three days.

Heat the oven to 400 degrees. Sprinkle crumbs over the top of the potato casserole and bake until golden and crisp, 30 to 40 minutes.

Recipe from Melissa Clark and published in New York Times

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