Separate cauliflower into florets and cut in smaller chunks.
In a medium pot, combine cauliflower, garlic and enough cold water to cover the vegetables.
Place a lid on top and bring to a boil. Reduce heat to low and cook for about 10 minutes or until cauliflower is fork tender. Drain and do not discard garlic clove.
Optional step: For thicker mash, transfer cooled boiled cauliflower into linen towel, twist and turn, and squeeze excess water. For more thin mash, leave as is. Matter of personal preference.
Add butter, salt and ground black pepper. Using an immersion blender or a food processor, process until very smooth or desired consistency.
Video
Notes
Serve: Cauliflower mashed potatoes taste best fresh and consumed same day. Next day, there is a very prominent cabbage smell.
Reheat: I do not suggest to reheat it next day. I recommend to make only what you will eat same day. You can cut the recipe in half.
Freeze: I also do not suggest to freeze it. I tried and I did not like the results.