Heat oven to 375°F. Butter a 2-quart baking dish. Warm cream, garlic, salt, nutmeg, pepper and rosemary until steaming.

Layer half the potatoes, cream and cheese in the dish; repeat. Cover tightly with foil.

Bake 40–45 minutes. Uncover; bake 15–20 minutes until golden and a knife passes easily through the center.

Rest 10 minutes before serving.