Pau Baji at Raj
This was kinda cool - it was almost like an Indian version of sloppy joes, but vegetarian and spicy. Scoop some of the good stuff on the little buns, complement it with some of the fresh garnishes, and you're good to go.
It was also interesting to see this on Raj's chaat menu. All my experiences with chaat so far have been largely based on tamarind and maybe yogurt, so this was quite a refreshing break from that formula.