Creamy Cauliflower Soup

Cream of cauliflower soup is a classic preparation that is too rich for many modern American home cooks. This lightened version is no compromise, even though it is comparatively low in fat. Silky and baby-mild, the shiny puree makes a fine opener for a multicourse meal or a light lunch for lovers of delicate dishes. For a lush finish, add a spoonful of cream and scattering of pistachios to each serving.