Preparation time : a few minutes
Refrigeration time: 12 hours (prepare the day before)
Cooking time: About 10 minutes
 

1. Cut the cheese into small pieces and cover with milk. Refrigerate for 12 hours. 
2. Shortly before serving, place the fondue pot with the cheese and milk over a double boiler; heat over medium heat, stirring constantly, until the cheese is melted.
3. Add the butter. Mix in the egg yolks one at a time. Careful: the water in the double boiler must not boil, otherwise the yolks will curdle. Season with salt and pepper to taste.
4. Bring the fondue pot to the center of the table and place on a warmer on very low flame. Plunge a cube of bread into the cheese mixture. Think about your diet tomorrow!