If you don’t have a high-powered blender then place the cashews in water and soak for about 3 hours. Then add cashews and remaining ingredients to blender and blend.
If you have a high-powered blender, place all ingredients into the blender and blend until smooth and creamy. Put in a container and place in the refrigerator to chill before serving. Dip will thicken slightly as it chills.
Place into a bowl and sprinkle with chopped chives if desired.
Store in a covered glass container in the refrigerator for up to a week.