Cook the cauliflower until super tender using whichever method you prefer. Transfer the cooked cauliflower to a large bowl (drained, if necessary), and add cream cheese and some blue cheese crumbles. 

Use a potato masher to mash everything together. Use a food processor if you prefer a smoother finish.

Taste for seasoning and add salt and pepper as necessary. 

Transfer to a serving bowl or plate and serve, garnished with a little chopped parsley.