I think we need to know more about it...was it a cauliflower cheese sort of thing?
Boiled cauliflower in a cheese sauce?
I can tell you how to do that though I suspect this wasn't it???
Boil cauliflower, put it in an oven proof dish.
Cheese sauce is easy, melt a dessert spoon of butter, stir in a desert spoon of flour (will look like thick yellow paste) then add in some milk and start stiring, once you have blended it, you keep it on the heat and keep adding milk till it is the right thickness, STIR IT ALL THE TIME, make it a bit on the thick side really, then add strong grated cheese - this will thin it down a bit so watch that you don't over thin it at first.
Then put it over the cauliflower (macaroni, broccoli etc) and crumble a bit of bread on top to give it a topping and stick it in the oven on REALLY HOT for about 5-10 minutes.
I do this regularly and just put grilled bacon with it. Everyone eats it.