Boil until Cauliflower is tender. Transfer to food processor, remove bay leaf, and purée in blender or food processor until smooth.
Keto Variation - Optional to leave out the carrots and add lots o cheese after it's pureed.
Instant Pot Variation - Saute in the InstantPot on saute setting. After adding milk/chicken/etc., put on lid and cook on Soup setting for 10 minutes if using riced cauliflower, 15 minutes if using cauliflower florets. Release steam and proceed with pureeing.