Wash and peel the potatoes. Slice them thinly using a sharp knife. Try to keep slices even. This helps them cook evenly and gives a smooth layered texture.

In a saucepan, add cream, milk, garlic, salt, pepper and nutmeg. Heat on medium. Stir gently until warm. Do not boil. This mixture gives rich flavor.

Take your baking dish and spread butter evenly inside. This prevents sticking. It also adds flavor. Make sure to cover all sides for best results.

Place a layer of sliced potatoes in the dish. Pour some cream mixture over them. Repeat layers until all potatoes are used. This builds the classic scalloped texture.

Sprinkle grated cheese between layers if you like. It adds a rich and cheesy taste. This step is optional but very popular in many homes.

Preheat oven to 180°C (350°F). Cover the dish with foil. Bake for 40 minutes. Then remove foil and bake for 20 more minutes until golden on top.

Remove from oven and let it rest for 10 minutes. This helps the sauce thicken. Garnish with parsley and serve warm for best flavor.