First soak the dates and cashews in water - especially if you don't have a high speed blender like a Vitamix. They will need to soak for a couple of hours depending on your blender.
Add all the ingredients to blender and blend until smooth and creamy.
Be sure to taste and adjust any of the seasonings to your liking before serving. You can serve immediately, but it's really tasty after it's chilled for a few hours.
Store in an airtight container up to 3 days in the fridge. This batch makes about 4 cups.