With a POD of 1815, have Yazd, Kerman, Amol, Baku, Bombay or another city you find more plausible in the modern territory of Iran, Afghanistan, Azerbaijan, Pakistan or India become independent under a Zoroastrian republic as a city-state, or if you feel it is possible, a larger Zoroastrian state.
Too difficult? If you don't think it's at all plausible, then you can have a POD back to the Ilkhanate days, but it has to last until the present day.
Too difficult? If you don't think it's at all plausible, then you can have a POD back to the Ilkhanate days, but it has to last until the present day.