- In a blender, combine the pistachios and almond milk and blend until smooth. 
- Add in heavy cream, sweetener, vanilla extract, and salt, blending until fully combined. 
- Pour the mixture into a Ninja Creami pint container and freeze for 24 hours. 
- Once frozen, place the container in the Ninja Creami, select 'Ice Cream' mode, and let the machine churn. 
- If the consistency is too thick, add a splash of almond milk and re-blend. 
- Serve and enjoy your sugar-free pistachio ice cream!