Don't know if others have mentioned the ones below but I'll just include my personal faves:

Popiah - Bee Hooi Coffee Shop (Jln Burmah)

Pork porridge/noodles - The coffee shop at the corner of Kg Malabar and Penang Road

Char koay teow - Coffee shop opposite P.Tikus police station

Assam and siam laksa - Coffee shop opposite P.Tikus police station

Chicken Rice - Bee Hooi coffee shop, Jln Burmah

Chee cheong fun (Hong Kong style, I love it for breakfast) - Tg Bungah market (the hawker stall area inside the market)