Sweet and yukon gold potatoes are the focal point of this gratin that's perfect for the holidays. Fresh parsley and chives deliver a fresh punch that adds an unbeatable flavor. Our favorite casserole cheese, gruyère, tops off the casserole. "This luscious gratin strikes a happy middle chord for those hungry for potatoes and those vying for a sweet potato casserole." --Nancy Vienneau, author of Third Thursday Community Potluck Cookbook, from which this recipe was adapted.
2 shallots, diced
1/4 cup butter, divided
2 cups heavy cream
2 tablespoons chopped parsley
1 tablespoon chopped chives
1 teaspoon kosher salt
1/2 teaspoon ground white pepper
1/8 teaspoon freshly grated nutmeg
1 1/2 pounds Yukon gold potatoes
1 1/2 pounds sweet potatoes
2 cups milk
1 1/2 cups (6 oz.) shredded Gruyère cheese
1/4 cup grated Parmesan cheese
How to Make It
Preheat oven to 375°. Sauté shallots in 3 Tbsp. melted butter in a saucepan over medium heat 2 minutes. Stir in cream and next 5 ingredients; cook 2 minutes. Remove from heat; cool 15 minutes.
Meanwhile, peel and thinly slice all potatoes. Combine sliced potatoes and milk in a large, microwave-safe bowl. Cover with plastic wrap, and microwave at HIGH 5 minutes. Uncover and gently stir mixture. Re-cover and microwave 5 more minutes. Drain mixture, discarding milk.
Layer one-third of Yukon gold potatoes in a well-greased (with butter) 9- x 13-inch baking dish; top with one-third of sweet potatoes. Spoon one-third of cream mixture over potatoes, and sprinkle with 1/2 cup Gruyère cheese. Repeat layers twice, and top with Parmesan cheese. Cut remaining 1 Tbsp. butter into small pieces, and dot over top. Cover with foil.
Bake at 375° for 30 minutes. Uncover; bake 20 minutes or until browned. Let stand 10 minutes.
Adapted from Third Thursday Community Potluck Cookbook.
Love this recipe. My mother, for health reasons, is not eating Nightshades so I substituted white sweet potatoes for the Yukon potatoes and it is just as yummy. Took it to a potluck at church and was asked for the recipe several times.
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