Yes, like the others have said the point in the superfree is to reduce the amount of non-superfree food you eat (as it is is more energy-dense ie more calories).
So if you had some fruit with it you would need LESS of the higher-calorie muesli & yoghurt to get to the point where you were satisfied/full. eg maybe you could have fruit in your yoghurt but omit the cereal? Or just have half the amount of muesli and pad it out with fruit. That way you get a lot less calories in the meal itself.
Or for people having a cooked breakfast, instead of having, say, 2 rashers of bacon, 2 sausages, beans etc you would add tomatoes, mushrooms onions and only eat maybe one sausage, one bacon and half as much beans. That make it clearer?
To be honest though breakfast is probably the hardest meal to get superfree in if its not a cooked one.