Remove the hard base and leaves from the cauliflower. Boil for 15 minutes until it becomes a bit tender. Drain and detach the sprigs, and place them on an oven dish. Make a white sauce with 2 and 1/2 soup spoons butter, the flour and hot milk. Add 1/2 soup spoon salt, the rest of the butter and 25 grams of grated cheese.

Pour the sauce over the cauliflower and place the dish in the oven for 15 minutes until it becomes a light golden brown.