Step 1: 1. In a saucepan, melt the butter, add the flour to make a roux.
Step 2: 2. Then add the milk and heat, you may need to stir for a while to get rid of any lumps. This is now a béchamel sauce.
Step 3: 3. Add most of the cheese and stir. Leave on the heat and stir occasionally.
Step 4: 4. Meanwhile boil the cauliflower for 5 minutes, when cooked drain well to get rid of the water and add to the cheese sauce.
Step 5: 5. Put the rest of the cheese on top and grill in a non plastic or metallic serving bowl.