Preparation Time: 10 minutes
Cooking Time: 1 hour
1 ? pounds
2 teaspoons margarine
½ cup (50g) grated low-fat Gruyère cheese
1 cup (20 cL) 2% milk
¼ cup crème fraîche
Peel the potatoes and cut them into thin round slices.
Grease the gratin dish with the margarine.
Place the first layer of potatoes in the dish and then a layer of cheese and so on.
Salt and pepper.
Mix together the milk and crème fraîche and pour the mixture over the potatoes.
Cook in the oven for 60 minutes at 400°F (200°C).