Finally, I managed to find so far 4 Halal Food dining place in HK. All are located in Tsim Sha Tsui. Most of them serve Pakistan/Indian or Arab cruisine. The nasi beriyani was the best so far, which cost me $48. Even better than the one in Zam Zam Restaurant in Singapore. Price of food ranges from $18 to $100. There is also the Kowloon Masjid in TST area where we solat Magrib, Isya and Terawikh.
Anyway, my reconmendation here would be Shadowman Cybercafe, in Ashley Road. The owner is a Muslim from Singapore, En Abd Kadir and the food is really tasty & nice. Siap ada tulis ditanggung Halal kat depan kedai.