Is not the real Parsi cooking still in Iran being prepared by millions of Persians every day? Or do you mean Parsi/Indian cuisine? Millions of Persians celebrate New Years with traditions and meals that go back to pre Islamic times. Perhaps the Zorastrian/Parsi expats are dwindling in numbers, but certainly not the culture and food of the Persian people. Persians are proud of their pre Islamic culture and cuisine, and they are protective of it.
Don't get me wrong though, I did enjoy the story, Zorastrians I am curious about and there is not a lot of info out there about them. I wonder how much they have in common with their brothers and sisters in Iran. Who is really more like the Persians of old, the ones that changed their religion or the ones that left their country many centuries ago? Observing and knowing immigrants here in the U.S., it seems almost impossible for even second generation offspring to not be heavily influenced by our culture and way of life...