Egg tart (dàntà fourth tone) (Egg Tart) is a Western-style pie with egg paste as filling; it is called egg tart in Taiwan. "Tart" is the transliteration of the English "tart", which means that the filling is exposed.
Pie (pie) (a pie whose surface is covered with crust and the fillings are sealed); egg tart is a "tart" with egg paste as filling.