so i followed the recipie now, and used fromage fraise instead, no problem, i added two extra yolks mind, and while i was gently heating it i crumbled in a little bit of an oxo cube, and added garlic granules.
i then let it cool down once it was thick enough, put it in the fridge, and added another spoon full of fromage fraige to it and stired it through.
it is lush, i am not sure if it would do a potato salad, that will be my next try later in the week, will go and demolish the "mayo" with some syn free chips now yum yum