Ireland also had seaports. Various aspects of Liverpool culture can actually be traced to Ireland - and vice versa.

Of course, there's not much in a "traditional" Irish Stew that's native to Ireland.

Ireland got South American potatoes from ships of the Spanish Armada that were wrecked on the northern shores of Ireland. The Spanish carried them to ward off scurvy.

The Victorian English claimed that it was the English, particularly Sir Francis Drake, who introduced potatoes to the Irish (Drake had a large estate stolen from the Irish). In actuality the Irish were growing potatoes as a significant crop for decades before they were introduced to England.