> In fact, Roman cuisine wasn’t at all like Italian food. It was all about contrasting sweet with salty and sour foods (they liked to eat fishgut sauce, garum, with melon).
It's true that it wasn't at all like Italian food, but this is a particularly bad example:
1. garum kinda lives on as colatura di alici, though the former was fermented, and the latter isn't [1]
2. Italian cuisine still contrast melon with salty food, just prosciutto, not fish