A very well known HK
Kam Wah Café (金華冰廳)6
Why locals love it
The well known tea set, Pineapple bun and Hong Kong style milk tea, is very delicious. I regularly go this cafe and they still keep the quality level. However, as a non-chinese tourist, it is quite hard to communicate with the waiter as they have difficulty to speak English.
Why you should visit it
The food are delicious with reasonable price.
Universal theory: if you can't speak and read Chinese, look around what the locals are eating and order most.