Place butter in the bottom of a large pot and melt on medium heat. Add frozen cauliflower rice and sauté until it is no longer frozen.
Add water and bring to a boil. Water should just cover the cauliflower rice. Boil, covered, for 15-20 minutes, until cauliflower is soft.
Using a ladle, apply pressure to the cauliflower and remove as much water as you can. Reserve approximately ¼ cup in a bowl.
Add cooked cauliflower to a large mixing bowl (this is when you would add the optional seasoning). Using a hand mixer, beat the cauliflower and slowly add the reserved water from cooking, until desired consistency is achieved.