In a medium saucepan, heat the cream, milk, sugar and salt over medium heat until it just begins to simmer.
In a separate bowl, whisk together the egg yolks.
Slowly add 1/2 cup of the hot cream mixture to the egg yolks, whisking constantly.
Add the egg mixture back into the saucepan and cook over low heat, stirring constantly with a wooden spoon until it thickens and coats the back of the spoon.
Remove from heat and stir in the chopped chocolate until melted.
Strain through a fine mesh sieve into a bowl and cool completely.
Chill in refrigerator for at least 4 hours or overnight before churning in an ice cream maker according to manufacturer's instructions.
Transfer to an airtight container and freeze for at least 4 hours before serving.