Since we have been talking about portugese egg tart, I would have to mention that the original portugese egg tart is found in Belem, Lisbon. It was discovered since 1837( yes the year is correct)
Well, if you ask me, I actually like the improvised version that you could find in Asia. The original version is more bland and the taste less strong compared with the ones you could find from Macau/Asia. Nevertheless, it is a must try if you do visit Lisbon.
Location: Casa Pasteis De Belem,
Rua de Belem 84, Lisbon
http://www.pasteisdebelem.pt/( you could check out the website- all in portugese)