Set up an ice bath by placing a 2-quart bowl into a larger bowl that has been filled with ice water. Place a strainer over the smaller bowl and set aside.
Combine the milk, cream, sugar and salt into a medium saucepan over medium heat. Bring the mixture to a simmer, stirring occasionally. Remove from the heat.
In a large bowl, whisk the egg yolks until they have lightened in color.
Gradually pour some of the milk/cream mixture into the yolks, whisking constantly as you slowly pour. Scrape the mixture back into the saucepan.
Cook over low heat, stirring and scraping the pan constantly with a spatula, until the mixture is silky, thickens and reaches a temperature of 170-175F.
Strain the mixture into the bowl on the ice and stir the mixture over the ice until the mixture cools to room temperature.
Stir in the vanilla and vanilla bean. Cover and refrigerate the mixture for a minimum 8 hours, preferably overnight or 24 hours.