I often stay around the Bukit Bintang area in KL during my visits, and there are several places I normally go for a quick and delicious breakfast. One of them is a kopitiam along Jalan Imbi - Restoran Win Heng Seng. This is actually 2 shophouses linked together - and is always packed. The turnover is very quick though, so if you are prepared to wait a few minutes a table would usually clear up. If you are alone and not too shy - you can always share a table with others which is a common thing to do here.
There are quite a lot of stalls here ranging from kuih tiaw soup to yong tau foo to pork soup with mee hoon and char siew rice. I like the pork soup which is always very tasty and the ingredients such as pig's intestine and liver used are usually of very good quality.
The other must have item is the yong tau foo.The average yong tau foo can be bland and unexciting, but here the fish paste is made with very good fish and packed with flavours. Mixed with the slightly sweet and savoury sauce - they are a tasty snack.