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.
After the success of "Maleficent" at the box office Disney is opening their vault to re-work the classics into live-action movies, and a number of other film studios are following suit. Here are ten live-action remakes to look forward to.