What Tostada means
Tostada is a Mexican antojito name of Spanish origin meaning "toasted one". It comes from Spanish tostada (toasted). It is pronounced tos-TAH-dah, and it is most associated with the whole country.
The name describes the tortilla, not what goes on it: a tortilla toasted or fried flat until it snaps.
This is a site about what Mexican words mean, so there is no recipe here. For the name itself: Antojito means "little craving". These are the masa-based street foods named for their shape more often than their filling: a sope is a small mound, a huarache is a sandal, a gordita is a fat little one, a tlacoyo is an oval patty.
