hi lord bubbles,  in the introduction of the kushi balti book, he mentions a cucumber like vegetable he uses when cookng a meal for some people he met off the beaten track( i think they were tiger spotters)well he was in india, he used it just like a vegetable in the "balti style dish" for a dopioza. but he did not provide a recipe for it and he never found or used it again, sorry can't help more than that. although would suggest a more authentic style curry and not BIR.

regards
gary