Place several inches of water in a pot and bring to a boil. Drop in small amounts of cauliflower at one time; boil for one minute; remove and drain. Repeat for the rest of cauliflower.

Cook the dressing: Place the tahini, onion, lemon juice in a suribachi and grind several seconds. Add the miso and puree into a smooth paste. Then add water and puree until smooth. Can use a blender.

Place each postion of cooked cauliflower on a serving platter with dressing on top.