4 Make mash
Meanwhile, chop the cauliflower into small florets. Bring a large pot of salted water to a boil. Add the cauliflower and cook, covered, for 10-12 min until soft. Once soft, drain the cauliflower. Add the cauliflower and butter to a food processor. Blitz for 1-2 min until really smooth. Add the Parmesan and season generously with salt and pepper.