# Components:
→ Potatoes
01 - 2.5 lbs Yukon Gold or Russet potatoes, peeled and sliced 1/8-inch thick
→ Dairy
02 - 2 cups heavy cream
03 - 1 cup whole milk
04 - 2 cups Gruyere cheese, grated
05 - 1/2 cup Parmesan cheese, grated
06 - 2 tablespoons unsalted butter, plus additional for greasing
→ Aromatics & Seasonings
07 - 2 cloves garlic, minced
08 - 1/2 teaspoon freshly ground black pepper
09 - 1 1/2 teaspoons Kosher salt
10 - 1/4 teaspoon ground nutmeg
11 - 1 tablespoon fresh thyme leaves or 1 teaspoon dried thyme
# Directions:
01 - Preheat oven to 375°F. Grease a 9x13-inch baking dish with butter.
02 - In a medium saucepan, combine heavy cream, whole milk, minced garlic, salt, pepper, and nutmeg. Warm over medium-low heat until steaming without boiling. Stir in half of the thyme.
03 - Arrange half of the potato slices in an even layer in the prepared baking dish.
04 - Pour half of the cream mixture over the potatoes. Sprinkle with half of the Gruyere and Parmesan cheeses.
05 - Arrange the remaining potato slices on top. Pour over the rest of the cream mixture. Scatter the remaining Gruyere, Parmesan, and thyme. Dot with butter.
06 - Cover tightly with foil and bake for 45 minutes. Remove foil and bake for another 25 to 30 minutes until potatoes are tender and the top is golden and bubbling.
07 - Allow the dish to rest for a minimum of 15 minutes before serving, permitting the sauce to thicken.