Combine the milk, sugar, cream, salt and in a medium saucepan and heat until it's beginning to bubble but don't let it boil.
While that is getting hot, whisk the egg yolks together in a separate bowl. While whisking constantly, pour a little of the hot cream mix to the yolks, then add the milky yolks to the saucepan.
Stirring constantly, cook until the mixture get thick enough to coat the back of a spoon. (Temp no more than 170ºF (77ºC).
Strain the mixture into a bowl, then stir the mixture over an ice bath until cool and add the vanilla
Puree the black raspberries in a blender and strain through a sieve to remove the seeds.
Stir the puree into the custard.
Cover and put in the fridge for at least two hours, but I would do overnight
Take out of the fridge and make it according to the manufacturer’s instructions. (I always use my Cuisinart Ice Cream Maker)*
While the mixture is freezing, melt the chocolate in a small bowl over a pot of simmering water, or in a microwave oven on low power, stirring until smooth.
When you are just about done making the ice cream, drizzle the chocolate into the ice cream. Stir it well and then, do it again with more chocolate.
Wow everyone by serving it immediately or store in an airtight container in the freezer for up to 2 weeks.