Consider the amount of cake and other baked stuff she and her family must get through, none of them are obese.
When she tastes food on the TV, she actually eats it. Dosen't have a tiny sliver and then spits it out.
Even the bread baking man with his own oven in the garden was really skinny.
Everyone I know who is on a diet, tries to cut out stuff like carbs and wheat. They must be doing something right.
You can have all that stuff, in moderation. No diet will be sustainable if you try to completely cut them out.
I think it is lifestyle more than what we actually eat. Her and her family seem active too, going for a walk after lunch and what not rather than just sitting in front of the telly and falling asleep.