Po Toi and South Lamma (Sok Kwu Wan) are only Chinese seafood restaurants.
If you go to North Lamma (Yung Shue Wan) you have a wide choice of restaurants.
There is really good pub grub at Diesel's which is along the main street. Pizza Milano does good pizza and pasta and is on the back street (keep going along main street and turn left at the hippy selling books!). just before Pizza Milano is a
Turkish joint. Go past the hippy selling books and continue and you will get to
The Bookworm which is a very good vegetarian restaurant (started by the same guy who started Life in SoHo). If you want a curry there is the Spicy Island on the main street or the
Deli Lamma which does Indian/International which is a bit further up the main street, before Diesel's.
I tell you what....head over there and you wont be disappointed or short of choice.