1 tablespoon plus 2 teaspoons kosher salt, divided
2 teaspoons ground black pepper, divided
¼ teaspoon ground nutmeg
4 pounds russet potatoes, thinly sliced
½ cup grated Parmesan cheese
Garnish: fresh thyme
Instructions
Preheat oven to 325°. Rub a 12-inch cast-iron skillet with butter.
In a medium saucepan, bring cream, garlic, thyme, 1 tablespoon salt, 1 teaspoon pepper, and nutmeg to a boil over medium heat. Reduce heat to low, and simmer until garlic is tender, about 15 minutes. Remove from heat.
In a large bowl, combine potatoes, remaining 2 teaspoons salt, and remaining 1 teaspoon pepper. Layer potatoes in prepared skillet. Pour cream mixture over potatoes. Cover tightly with foil.
Bake until potatoes are tender, about 1 hour. Remove foil; sprinkle with cheese. Increase oven to 400°.
Bake until golden brown, about 15 minutes. Garnish with thyme, if desired.
Recipe by Southern Cast Iron at https://southerncastiron.com/scalloped-potato-gratin/