I've looked in the Real Academia Española dictionary and I can't find any information regarding why Spanish uses the preposition
a for cooking styles, and I've noticed French and Italian do it too. I know that the languages use the word, but I don't understand how in a broad sense outside of cuisine.
fajitas a la parilla(Spanish)
mojo al ajo(Spanish)
escargots à la bourguignonne(French)
spaghetti alla carbonara(Italian)
In what sense is the
a being used here?