Slimming World Cheese Sauce 1) Place the quark into a large mixing bowl and beat until relatively smooth. 2) Add the fromage frais to the quark and mix well. 3) In a separate dish, beat two eggs. 4) Add the eggs to the cheesy mix and stir well. Keep stirring! It will get better… See! 5) Add a pinch or two of nutmeg to the whole thing and mix.