Rich and Creamy Potatoes au Gratin

Preheat the oven to 350 degrees F (175 degrees C).

Place potatoes, garlic, and salt into a large pot; fill with enough water to cover. Bring to a boil; reduce heat to medium and simmer potatoes until tender but not mushy, 8 to 10 minutes. Use a slotted spoon to transfer about half the potatoes into a 9x13-inch baking dish.

Pour 1/2 of the cream over the potatoes and season with black pepper and nutmeg; sprinkle 1/2 of the Gruyère cheese on top. Layer the remaining potatoes on top and season with black pepper and nutmeg. Pour over remaining cream and sprinkle with remaining Gruyère cheese.