preheat oven to 220c gas 7

break up cauliflower and add to boiling water for 5mins

as the cauliflower is boiling add the milk butter and flour to a pan and heat whisking untill nice and thick

once thick take off the heat and add the cheese

drain cauliflower and add to a oven proof dish, then pour over the sauce

you can sprinkle extra cheese over the top if you desire then add to the oven for approx 20mins