For 6 people
For 6 people
Place the chard in boiling water and cook for 20 minutes. Then drain and cut into pieces.
Preheat the oven to 210°C. Place the chard in a buttered baking dish.
For the béchamel sauce, put the flour and melted butter in a saucepan over medium heat. Then stir in the milk. Season with salt, pepper, and nutmeg.
Stir in the egg yolks and Gruyère cheese off the heat.
Pour the sauce over the chard and bake for about 20 minutes.
Serve.