In a large saucepan, heat the cream, milk, and salt until it is steaming well, then remove from heat.
Separate the egg yolks from the whites and set the whites aside for another use. (Perhaps macarons?)
In a large bowl, whisk the egg yolks and sugar together until they are well combined and the sugar is dissolved.
S l o w l y add the hot milk mixture to the eggs - one ladleful at a time or in a very thin stream.
Pour the cream back into the saucepan and heat over medium-low heat until it thickens slightly and coats the back of a wooden spoon. Watch it closely and stir often - it is easy to heat the mixture too fast and cause it to curdle. *
Let the cream cool to room temperature, then place it in the refrigerator overnight to chill.
The next day, churn the cream according to the instructions on your churn, then smooth it into a loaf pan. Freeze until set.