Soak the raw cashews in hot water for 20 minutes (or cold water for 2 hours) then drain and rinse with cold water.
In a high powered blender, blend and/or pulse until you've reached your desired consistency. (You'll need to scrape the sides down a few times and use the tamper to get the right texture.)
Taste and add more salt or vinegar/lemon juice as needed.
Store in an airtight container in the fridge for up to 1 week.
Notes
The soaking helps to soften up the texture for blending.
You made need to add more water to get the right consistency. Add a tablespoon more at a time until your preferred texture is achieved.