The first time I heard about this awesome dish was when in a nostalgic moment, Prashant was reminiscing about Lucknowi khana, which he used to miss in Delhi, Since that day, this biryani was soething he mentioned often, leaving me with little choice but to dig up its recipe and try my hand at it. The first time when we made it, I came closer to understanding, why mutton biryani and the humble vegetable biryani are in different leagues altogether.
Update: I was editing this post and I accidentally deleted it. I'll be putting down the recipe again soon, but it might be a bit different from what I had written earlier. Meanwhile, if anybody happens to have saved a copy, please do let me know. Thank you.