You need to do at least one whole week of serious eating to do justice to KL’s food scene. 
When I moved to KL from Singapore back in 2011, I was like a fish out of water. I didn’t know where to start. There are three Little Indias from what I could see: one downtown in Jalan Tun HS Lee area, one in Brickfields and one in Sentul. Each has its own good places - I go to Tasty Chapathi in Sentul for the best Punjabi food in town, whilst I’d trudge down to Mavalli Tiffin Rooms (a branch of the iconic Bangalore eatery) in Brickfields for the best South Indian breakfast in KL.
Newer, bigger restaurants no longer open in downtown KL - they proliferate in trendier dining precincts like Mont Kiara, Taman Tun Dr Ismail, Damansara, Bangsar, etc.
KL’s crumbling, old Chinatown is fast losing its Chinese character as most younger Chinese have moved from there to swish new suburbs like Sri Petaling and Puchong, where you find the big, new Chinese restaurants.
I remember posting on over 1,300 eating places in KL on Chowhound over 6 years - more as a convenient database that I can refer to. Totally shattered when they closed down CH.
