I actually wrote the recipe. I think it would be fine if you wanted to add some cauliflower to it to bulk it out, but I'd also increase the amount of liquid. To be honest it might be a bit tricky to get it right.
Say you added half a head of cauliflower to the mix, I'd increase the liquid content by 1/2 a cup at least - a bit more stock and a bit more cream.
To celebrate the super release of the action packed, family adventure Barbie in Princess Power, available on Blu-ray?, DVD & Digital with Ultraviolet? from March 19, we're giving one lucky parent the chance to win the entire collection of Barbie DVDs and a Barbie Super Sparkle Doll.
To celebrate the release of SHAUN THE SHEEP THE MOVIE, In Cinemas March 26, we are giving away 50x prize packs that include a Shaun the Sheep drink bottle, stationery set, drawstring bag and family pass to see the film.