When she was sent to Equestria with the Raudeardwahist-led expeditionary force against the Storm King, Parviz didn't expect her stay in Equestria to last more than a couple of months.

However, as Twilight began formulating her plan for a 'School of Friendship', and the other three shahs got hold of it and started developing a more practical approach to the concept, Fleur-Ardashir decided to have Parviz convince Twilight of the new approach, and help with setting up the School, and she wound up living on Twilight's 'castle' (a house on the outskirts of Ævrefreodeh built after Twilight realized the Treehouse library was too small of a place to exercise her functions from, which started out small and was expanded as necessity arose)

While Parviz managed to convince Twilight to settle for having her friends do only one guest lecture a week instead of being regular teachers, soon they had begun diverging on how to operate the School. both realized that they both were out of their depth on the actual running of a school, but while Twilight began looking to the EEA for orientation, Parviz realized that the concept they were working with was something completely novel, and some things would inevitably have to be developed on a trial and error basis. It took Twilight falling out with the head of the EEA for her to start going with Parviz's method, but that wouldn't be until one week after the opening of the School.

Exactly because of this, Parviz spent the first semester teaching the regular lessons (guest lectures excluded) herself, as she figured out how to divide lessons' subjects and gauge how the students were learning, which were necessary before they could start hiring extra teachers. Fortunately, since it was only the first year, she only had to deal with only one class then.

Regardless, meals were a challenge of their own:

While most sapient species in the world tend to be full-time herbivores, some species (specifically, griffons, dragons, yinglets, avians, diamond dogs and to lesser degree, hippogriffs) are by the most part omnivores with a general preference towards meat (or seafood, in the case of hippogriffs and yinglets)

Her experience with mainland Equestrian culture was relatively limited, but she knew that Equestrian ponies tended to be more uneasy about others' meat consumption than Mazandaranian ponies, for a multitude of reasons. In addition to that, Wardagauna's recounting of the whole Zecora incident, and some of the reactions to her appearance had made her conclude that some ponies' view of Mazandaranian yinglets, especially on rural areas like that, were still coloured by the accounts from the 'discovery' days, when their predatory habits knew no species restriction, to say the least.

While Sataraceray, Twilight and her friends were understanding, not wanting to reinforce possible stereotypes, she began to keep her habit a secret from others outside of that circle. As the School was being built, Parviz claimed for her office a spot on the third floor about the same size as the Headmistress' office, intending to use that as both office and living quarters, no less to not to depend on Twilight teleporting/flying her to her house and back multiple times every day and as the School opened, she took to cooking and eating all her meals within her office. (Most of the meat she used as bought from Sakastan, which, due to it having a sizeable dragon population, descended from the Karmirxyon who had conquered the region in the pre-Discordian days, was the only Equestrian satrapy in which meat production operations were relatively common. )

Eventually, the isolation became too much for her, and she started inviting the three non-herbivore students (Surpatebuappa, Yakalevsiz and Golosístyj) to her office for lunch twice a week; the four soon were looking forward to these meetings — Parviz for the company, and the others, because Parviz was a good and somewhat versatile cook, and the socializing didn't hurt either.