In a small bowl, beat egg yolks, sugar, and salt until smooth, about 2-3 minutes. Set aside.
Combine milk and cream in a saucepan.
Heat over medium low heat until just starting to bubble around the edges.
Whisk a small amount of hot milk mixture into egg yolk mixture.
Repeat until milk and egg mixtures are combined.
Pour back into saucepan.
Cook over medium low heat, stirring constantly, until custard coats a spoon, about 5 minutes.
Strain into a clean bowl.
Stir in vanilla.
Place over an ice bath to cool.
Pour into ice cream machine and freeze according to manufacturer's directions.
Spoon out into a 10-inch cake pan.
Pipe jam over the top.
Swirl.
Freeze.