You can find Cantonese food in Hong Kong and in China’s Guangdong Province.
Eg. Dim sum, roasted meat: pork, goose, duck and roasted suckling pig.
These are dishes most people would like.
Dishes suitable especially if you are eating alone: Congee (rice soup), beef chow fun, wanton.
Other dishes like hotpot, or seafood from Pei Fung Tong (in the past in causeway, there was a style of cooking from people who lived on the boat).
There is also Hong Kong food, it can be a mix of western and Chinese food. It can also be snacks like fish ball type of street food, or claypot rice.
A very good example of these are egg tart, or egg waffles.