Soak the bread in the milk, then squeeze thoroughly.
Pass through a fine sieve with the hard-boiled egg yolks.
Add the raw egg yolks and seasoning and stir to a mayonnaise consistency
in the mixer.
Add the oil, drop by drop at first, then in a thin stream, stirring at
the same time until a creamy sauce is obtained.
Season to taste and stir in the chives just before serving.