Near Chowk is Tunde's kebab shop, famous amongst tourists and locals alike. However, for juicier, softer, incredibly scrumptious kebabs, stand before Tunde's hole-in-the-wall and veer left to the unmarked, smoky shop next door. You'll find that this no-name, no-fame shop serves up infinitely better fare than Tunde's flaunted food.
Warning: I have left much of the post unchanged from when it was first written, providing only two minor updates.
Full disclosure: A large chunk of my first novel Nani's Book of Suicides (2000) was written in Lucknow. I still have great memories of that period.