I haven't read it in too much detail, but a scan looks like most of the stuff she prepares at home is roasted veg/salad stuff with seeds/nuts/fresh herbs, which is very close to how I eat.
We keep chickens and grow a lot of produce, so there's fresh stuff and eggs to use. I work from home and I really love eating well and preparing food, so faffing around making a delicious lunch thing is something I love to do.
The difference is that I hardly ever eat out, and also I have no social media, so it's all done because I love it, not to preach or 'share' it. I make home made ice cream, granola, that kinda thing. I don't claim that it's helping my cognitive abilities (I spent this morning thinking it was Wednesday 
) but it's how I like to spend my time.