The Argentolian Empire is a massive land that spans a region roughly the size of the continental United States. Located in the southern hemisphere of its planet, the north is generally tropical, the south generally has a Mediterranean climate, and the middle is a series of harsh deserts and high mountains.
Here's a climate map of Sparteia, a northern region of the empire:
Here's a climate map of Pheron, a central region of the empire:
Given that the Argentolian Empire has the flora and fauna of the Palearctic, Nearctic, and Neotropical realms (for the purpose of ingredients), how would this varied geography and varied climates affect differences in cuisine in these provinces and just in general?