i've been in macau for 3 years now and this is still my favourite restaurant.
they sell the best wanton in the world - juicy and in big portions. they are located near the St Paul Ruins (just a 5 mins walk away) and are very reasonably priced.
I normally order wanton soup (delicious both fried or in soup), fried rice, veggies/tofu. Try their homemade chilli!
Friendly staff too :)
Cons: May be packed during mealtimes