Soak the cashew nuts in lukewarm water for about 1 - 2 hours, then drain and rinse.
Then beat all the ingredients except for the oil and herbs in a blender until creamy, season to taste, e.g., Garlic goes great, and then mix in the oil. Finally, if you like, mix in the fresh herbs, finely chopped.
Goes with all salads, including pasta salads, potato salads, coleslaw, etc.