While in India, I joined a three-plus hour walk through an Old Delhi bazaar with the opportunity to sample foods prepared on the spot, followed by a dinner at a haveli, a five-story, 17-room private home nestled in a side alley. The host is knowledgeable and a long-time resident. The food is vegetarian but delicious, and I'm a true carnivore.
Old Delhi Bazaar Walk & Haveli Visit, 1517 Gali Arya Samaj, Sita Ram Bazaar, Delhi; http://www.masterjikeehaveli.com. Half-day tours, $50. Full-day tours also available.