Classic Gratin Dauphinois with Gruyère

Method

1. Preheat the oven to 180°C (350°F).
2. Peel and slice the potatoes thinly.
3. In a saucepan, heat butter, add the onion and garlic, and sauté until soft.
4. Add the cream and milk, and bring to a simmer.
5. Season with salt and pepper.
6. In a baking dish, layer the potatoes and pour the cream mixture over them.
7. Sprinkle Gruyère cheese on top.
8. Bake for 40-50 minutes until golden and bubbly.