I make mine like this
Syn free on green day (plus 2hxa + 1hxb)
Whisk down a tub of quark with milk(250ml) from ur hxa so it becomes runny, add ur grated cheese from hxa..add pinch of mustard add salt to taste. Put all this in a pan on a low heat till all the ingredients are smooth. That’s ur cheese sauce ready
Pour this sauce over the cauliflower in a baking dish. Sprinkle with cheese from hxb and some black pepper
Bake in oven – approx 30min