Banana leaf rice. Very very popular and definitely delicious but it's not particularly easy to get to. It's a nice area though.
I had banana leaf rice with chicken-based curry sauce, fried bittergourd, mutton curry, chicken tikka, mango lassi and iced tea. It was a lot of food and I didn’t finish it all but I was so full up!
Probably my favourite banana leaf rice in KL (Vishal Food & Catering is 2nd). Recommended.
I always start off with extra pickle and bittergourd. If you want to try them first, it's absolutely fine to ask for extras later (for free).
Update: I went back at about 4pm on a weekday and didn't have to queue at all. I had the dry mutton curry (9/10), fried chicken (7/10) and the standard banana leaf rice (9/10).