So one would choose to eat subpar non-Chinese dinners rather than ordering one (or two) delicious Cantonese dishes? When you dine in non-Chinese restaurants, you still just order one entry too. Unless you go to eat Korean...
I think it's a stretch to assume that any other food in Hong Kong, other than Chinese, is sub-par. And when I dine in non-Chinese restaurants (other than Thai, Filipino, etc.), I do just order one entree, except that entree is usually sized to feed just one person.
There are plenty of single diners too in Hong Kong. It is true that most stir-fried entres are best enjoyed in a group so you can have the variety. But one can also have a bowl of wonton noodle (best in Hong Kong), jook (best in Hong Kong) and order some BBQ items such as roast ducks, BBQ pork, roast pork, etc. (again, best in Hong Kong). There are plenty of chow fun (fried rice noodle), chow mein (fried noodle), and the something-over-rice plates (again, best in Hong Kong).
Even plates of chow fun and chow mein (thanks for the translations, however unnecessary they were) tend to be too large for me. And at the time, I was unable to find any place which would sell me less than half a duck, though if I could have, I'd gladly have partaken. And if I had known the best place to order a bowl of wonton noodle, I'd gladly have partaken in that, too, but no one offered any advice (and I did ask).
The American-chains of fast food taste about the same (e.g. McDonald's, KFC, Burger King). Why fly over 7000 miles to have something that you can have at home? If you try to find some other non-Cantonese food, I am afraid you would walk out with an unsatisfied experience.
Why would you assume I was eating at American-chains? Or eating things I could have had at home? Or that I was even from America? Those are huge assumptions, and all are false.
At the time (6 or 7 years ago), I was living in Japan, and had been there for a few years. While in Hong Kong, one of the two non-Chinese restaurants I visited was, from what I could tell, a highly-regarded restaurant/bar that catered to ex-pat clientele (from the decor I would have assumed British). I had French onion soup and fried calamari, both which are ubiquitous in places like Canada and the US, but were virtually impossible to find in Japan at the time (and still rather difficult). And both were excellent versions of what they were.
The other non-Chinese meal was afternoon tea at the Peninsula Hotel. Only because my father had reminisced about afternoon tea at the Peninsula, so I felt I should experience it at least once in my life.
I did manage to visit with a local family who took me out for Peking duck at a highly regarded Peking duck restaurant. Peking duck may not be one of the foods "best in Hong Kong", but that is where they took me, and I was pleased to be taken there as I love Peking duck. Unfortunately, in my opinion it was sub-par (very fatty, which I was told was preferred there, and as a result, the skin was not as crispy as I like) and I was forced to order some divine Peking duck during a subsequent trip to Bangkok. Oops. There I go again, eating at a restaurant which does not specialize in foods local to the country. Except the Peking duck at the right places in Bangkok far outstrips Peking duck anywhere in terms of flavour and value (though I suppose it depends on your frame of reference). There will be little to no visible fat on the skin, and the skin will be perfectly crisp.
And if I could find decent Greek food in Bali or Singapore (or Bangkok, depending on where I am) in December, you can bet I'm going to have some, as there is none to be had in Japan.
Back to topic, I also really enjoyed going to the bakeries in Hong Kong. They were great for snacks and breakfasts. There must be some better than Maxim's, but I can only remember going to that one and it was good, or so I thought at the time. So I must add Maxim's to my list of places to visit, but if anyone knows a better bakery, feel free to recommend!