Cook cauliflower, drain. Blend with plain, unsweetened soymilk (or milk of your choice), sea salt & pepper, and about 1 tsp olive oil, in a blender (or food processor, or kitchen aid, etc.). Add fresh, chopped chives if you want, and voila!
One head of cauliflower serves about 4 people.
About 3/4 cup of milk per head of cauliflower, if you want to make more.