Bring a large pot of salted water to a boil. Cut cauliflower into florets then add to boiling water and cook 8 to 10 minutes or until a fork can easily be pierced through the cauliflower.Drain cauliflower then throw back into the hot pot (off the heat) and cover with lid. Let stand 2 to 3 minutes.Add the cream cheese, a pinch of salt and freshly ground black pepper to the cauliflower. Then, use a potato masher to smash the cauliflower. Finish with a pinch of nutmeg. (If you have whole nutmeg, just grate a little over the cauliflower using a microplane).Stir then serve with sliced green onions on top.