Por Lor Bao(BoLuoBao) and Egg Tarts are sold at those Cha Chan
Tang(Cha Can Ting), those famous ones will have long queue. ppl
there like to buy at the moment they have just been taken out from
the oven.
For street stalls(used to be trolleys,but govt catch them until
they rent shops, mostly found in MongKok area), Curry fish ball,
got normal/spicy, for singaporeans may prefer the spicy type. Many
others stuffs but personally i like curry fishball most.
Someone mentioned goose, the best goose is in Sum Cheung(Shen
Jin,"deep well"), a place quite far from the city tough.
For Roast pigeon, the best is in Long hua hotel(it's call JiuDian
but not really a hotel)in Shatin, also far from city area.
One more type of birds, it's call Wor Fa Cheuk(HeHuaQue), it's a
very small bird, very crispy, one bite can eat the whole
bird.
For Moon cakes/LaoPoBing, most famous is (Hang Heung)HengXiang,
which in YeungLeong, evem further from city than Shatin. But dun
worry, they got small shops in MongKok area nowdays, cos the HQ in
YeungLeong is really too far.
If u happen to go to see big Budda in Lantau Island, there's a
small shop near the busstop. Try the Tofu hua there.
many many more.... lazy to mention all.....