Just seen a review in todays Standard for The Parsee On Highgate Hill ( tel 7272 9091 ) an new and supposedly good place. I have not tried it but will next week. Charles Campion ( who is reasonably dependable ) was raving about it. The akoori was good and he also goes on about a dish called patra Ni Machchi which having pomfret in it was obviously lifted from a Bengali recipe:)
While I quite rightly view any indian food that does not come from bengal with huge suspicion, this does seem to be authentic
worth a try?