I will be in Delhi next week, just before you, and Jen Kalb also gave me some great ideas for classes. I am taking a cooking class with the owner of the www.delhibedandbreakfast.com and it turns out that her family also owns a tour company www.uniqueindiatour.com that does market tours, so I am spending a day shopping with her as well. They have been great about replying to me immediately to set up my time with them. It's very reasonable, about $45 for a lunch class and about $60-100 for the day tour. We are going to tailor the day tour to my needs, so it is as open as I want it to me. They also offer pick up and drop off from my hotel for about $20 additional, which saves me a day of hiring a driver. I am also in the process of setting up a day walking market tour of old Delhi (which includes local delicacies from restaurants) with another home cook recommended on Chowhound. Jyoti, at www.gourmetdesire.com . I'll let you know how it goes next week...
Rahul Verma is a good local food critic - he writes a lot of columns in The Hindu, readable on line.
Here is a link to one such. http://www.hindu.com/thehindu/mp/2005...
Charmaine O'Brien wrote an excellent book on eating in delhi, with a description of the different cuisines, restaurant reccs and a handfull of recipes. Its a few years old so some of the places have closed, but not many.
re: jen kalb
the Hindu is now running some of these columns in blog format
heres a link to that http://blogs.thehindu.com/delhi/?cat=581
I looked extensively for info prior to my trip last year and didnt find any really good local discussion site or travel sites with indepth dining reccs, since most sites (FOdors etc) tend to focus on the upscale/hotel restaurant choices - AnotherSubcontinent has some good food writing on India though its not primarily restaurant focussed- do search the chowhound site (using the main search box) for some of the prior posts, including mine. from my 2007 trip