This two-unit stall isn’t immediately noticeable (it’s situated in the middle aisle), but just look for a small crowd milling about as they wait for their orders and you will have found the gold.
The wait isn’t too long and is definitely worth it for the freshest appam made to order and served with fresh coconut milk and orange palm sugar. Crisp edges sink towards a spongy centre that you can choose to have plain ($3 for 2 pieces) or with egg ($2.50 each). More contemporary flavours like cheese and chocolate are also available, along with other South Indian staples like idli and dosa.