Ferran Adria made foams famous, but Indians may have beaten him to it by a few hundred years. Many years ago, my cousin was posted in Agra, and she used to buy something called Makhan from a sweet shop nearby. It was one of the most wonderful things I'd ever had - essentially an almost weightless saffron-flavoured foam. We used to have it with pooris, and it was the airiest, most fantastic dessert ever. Its also a dessert of romance; morning dew and moonlight are supposed to play important parts. I've tried a few times over to find Makhan elsewhere, but only UP and Delhi have even heard of it. I stumbled upon this article in the Hindu that talks about the Delhi version, Daulat Ka Chaat , and a few more references, including blog posts in Cooking with Simi and EOiD (who even had a map of where it is available in Delhi). Lucknow apparently calls it Nimish. Pushpesh Pant, the ever-obliging chronicler of all foods Avadhi, has published a recipe for it. Simple, but tedio...