Add all ingredients, except water, to the blender.
Begin blending on high, and pour the water into the blender, a little at a time, until desired consistency is reached. You probably will need between ⅓ - ½ cup.
Scrape down the sides of the blender as needed, and continue blending for 2-3 minutes.
Serve garnished with some chopped parsley, and/or sprinkled with sumac and sesame seeds.