Frozen Citron Mousse

Beat the egg yolks, sugar and salt together.

Scald the milk and the light cream and gradually pour into the beaten egg yolks while stirring vigorously. Return to the pan and heat, stirring, over medium heat until the mixture coats the back of the spoon. Do not allow to boil. Cool, then chill the custard.

Soak the citron in the cognac.