But the cheese flavour still surely come from the cheese - cheddar of whatever- that is put in the sauce to go her the cauliflower.
Creme fraiche will be an addition to the cheese sauce not a replacement for the cheese .
Yes fromage frais is a sort of cheese but it is so mild I dont think you'd want it as your only source of cheese.
I normally use a simple bechamel with grated cheese stirred in. Bechamel made with half milk and half cauli water. For a quiche (eg leek and chevre) I use creme fraiche with beaten egg in it, and use lovely French all-butter pastry rounds (about 75 centimes). I'll try creme fraiche for culi cheese next time; definitely add grated cheese to it.
And be careful with the low fat as it can make the sauce curdle or go a bit odd. Full fat anything is better for cooking purposes as a rule, in my experience.
I have bought two bags of cauliflower rice - I intended to mix with CF or FF and some grated cheese and bake in oven
I’ll probably throw it in the bin then - but hey you never know
I’d love to use cream but my cholesterol level will probably go sky high then
You could turn your cauli rice into a baked "risotto" with mushrooms.
Saute some sliced shallots, garlic and sliced Portobello mushrooms, add cauli rice when shallots are softened. Stir, add about 1/2 cup chicken stock plus a handful of grated parmesan if wanted, and cook gently for a few minutes...stirring. Pile into a baking dish and top with grated cheese. Bake until cheese is bubbling.