If you’re interested in what ancient romans ate, that seems well documented.

Bread, olives (and olive oil), cheese, meat, fish, fruit, nuts, wine.

https://en.wikipedia.org/wiki/Food_in_ancient_Rome

https://en.wikipedia.org/wiki/Apicius

Their giant mound of 53 million olive oil amphorae has always fascinated me: https://en.wikipedia.org/wiki/Monte_Testaccio 20 liters of oil per person annually.

I keep hoping I'll be able to get my hands on some silphium to see what it's like.