That's an issue with NOM. All non VVardenfell food should be rare before Dagoth Ur falls and the Blight storms end. The Lore suggests an effective quarantine which really would mean exactly what Pluto suggests....no free movement. Probably the reason the pirate activity is so high (and somewhat tolerated) on the island.
True. I was thinking that the imported foods should not be so abundant. NOM has lots of indiginous foods and meals but there are things like corn, onions, etc... You could argue that shipments come once in a great while but only to certain docks, like Seyda Neen and Ebonheart. And from there, they are shipped by wagon or carriage to the other towns like Pelagiad, Vivec, Balmora, etc... Pelagiad is an imperial town but they need to be corresponding with Cyrodiil at least. And with that, letters and packages must be delivered via ships. I suppose in theory they could teleport from Cyrodiil to Vvardenfell but not teleport out unless the mage was super skilled and could use mark and recall for that distance, although I'm not sure how that spell works exactly.
This sounds like it belongs in the lore thread.