Soak raw cashews in water overnight (or pour boiling water over them and soak for 10 minutes to speed up).
Mince garlic and mix with lime juice. Let sit 30 minutes to mellow the bite.
Add soaked cashews, garlic-lime mix, and remaining ingredients to a blender.
Blend until completely smooth, adding more water to adjust consistency if needed.
Season with additional kosher salt to taste.
Notes
Storage: Store in an airtight container in the fridge for up to 5 days. It will thicken as it chills, so thin with a splash of water if needed and give it a stir before serving.