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From the episode: Sunday Dinner

Mashed potato casserole, with the promise of fluffy, buttery, creamy potatoes nestled under a savory golden crust, is the perfect make-ahead dish during the holiday season.

Serves 6 to 8.

The casserole may also be baked in a 13 by 9-inch pan.
4 pounds russet potatoes , peeled and cut into 1-inch chunks
1/2 cup half-and-half
1/2 cup low-sodium chicken broth
12 tablespoons unsalted butter (1 1/2 sticks), cut into pieces
1 garlic clove , minced
2 teaspoons Dijon mustard
2 teaspoons salt
4 large eggs
1/4 cup finely chopped fresh chives

1. Adjust oven rack to upper-middle position and heat oven to 375 degrees. Bring potatoes and water to cover by 1 inch to boil in large pot over high heat. Reduce heat to medium and simmer until potatoes are tender, about 20 minutes.

2. Heat half-and-half, broth, butter, garlic, mustard, and salt in saucepan over medium-low heat until smooth, about 5 minutes. Keep warm.

3. Drain potatoes and transfer to large bowl. With electric mixer on medium-low speed, beat potatoes, slowly adding half-and-half mixture, until smooth and creamy, about 1 minute. Scrape down bowl; beat in eggs 1 at a time until incorporated, about 1 minute. Fold in chives.

4. Following photos 1 and 2 below, transfer potato mixture to greased 2-quart baking dish. Bake until potatoes rise and begin to brown, about 35 minutes. Let cool 10 minutes. Serve.

5. Make Ahead: The baking dish with the potatoes can be covered with plastic and refrigerated for up to 24 hours. When ready to bake, let the casserole sit at room temperature for 1 hour. Increase baking time by 10 minutes.

Secrets to Perfect Mashed Potato Casserole

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