Warm the milk, sugar, half the cream and salt in medium saucepan
Scrape the beans from the vanilla bean and add with the pod to the milk
Cover and steep for 30 minutes
Pour the remaining cream in a large bowl and set a mesh strainer on top
In a separate bowl, whisk the egg yolks
Slowly pour the warm mixture into the egg yolks, whisking constantly and then pour it back into the saucepan
Stir the mixture constantly over a medium heat, scraping the bottom as you stir until the mixture thickens and coats the back of a wooden spoon
Pour the custard through the strainer and stir it into the cream
Add the peanut butter and whisk until combined
Chill the mixture thoroughly (preferably overnight) and churn as per the manufacturer's instructions
Once the ice cream has been churned, add the chocolate chip and peanuts and mix well
Freeze the mixture until solid