NEW DELHI, April 19 -- Anil Viswanathan settles down in the cool interiors of Sangeetha, a popular restaurant just off the busy Sardar Patel Road in Adyar, Chennai. The roar of the traffic is muted and the escape from the muggy morning outside is welcome.

He's greeted with a Cadbury-flavoured gulab jamun. If that doesn't sound incongruous, more Cadbury-infused dishes come to the table for Viswanathan to taste: Cadbury elai adai, dosas, kuzhi paniyarams, chilly gobi, et al, all traditional dishes from a typical South Indian kitchen. So, what gives?

As Director, Marketing (chocolates) of Mondelez India (which owns the Cadbury brand), Viswanathan is on a whirlwind visit to Chennai where he will be tasting experimental cuisine at five promine...