First of all the sprouts are boiled; there are better was to cook them.
Then they are covered with a (tasty) bechamel, well, not covered, but drowned. Half the sauce would have been more than enough.
Not having access to dolcelatte cheese, I used St Agur, which was a recommended substitute somewhere.
Carluccio says the brussels sprouts are not really Italian; this treatment also doesn't seem very Italian.
Edible but nothing to do again.