There are a few reasons why I recommend to you these fast food restaurants.
To try the local food in local restaurants is not always easy, since the menu is not always in both Chinese and English. But in these fast food restaurants, their menu is shown on the wall in big Chinese characters, and small English letters. So foreigners should have no problem ordering the food. Warn you though, the staff at the cashier is not always good in English and maybe you need to point at the menu to order the food. I saw this happen a few times already.
Second, the food is inexpensive and tastes quite okay. Well, it is fast food and so you shouldn’t expect too much anyway. Sometimes some dishes taste really good. Say the curry rice from the Cafe de Coral. These restaurants are always packed for lunch and dinner.
Third, their branches are in every corner of Hong Kong and you can easily find them.
Fourth, these restaurants not only offer Chinese food, but also “Chinese style” Western food, such as spaghetti, or “Chinese style” Japanese food, such as Ramin. The choice is not limited anyway. And the Chinese food choice also comes in Hong Kong style and mainland Chinese style, such as Shanghai food.
Fifth, visiting these restaurants will let you experience the epitome of Hong Kong efficiency. Try standing at the food counter and you will see how quickly the staff put the order together for customers and keep the always long queue moving. There are usually three to four staff working behind the counter and they work so fast, and so seamlessly. I bet you will not forget the scene.
Some more tips：Hong Kong style milk tea is unique. These restaurants offer tasty milk tea. So try them. Also, if you are on budget, try coming in from 2pm to 6pm. These are afternoon tea hours and the tea set is offered at a very low price. Say, a hot dog with a cup of milk tea costs about HK15.