Irish immigrants to America changed their diet to the point where corn beef and cabbage became associated with the Irish. But Irish soda bread is still Irish.
a tip of the hat to Sukie
An interesting food difference - Irish scones are very different from the English variety. They're fried in a bit of oil and aren't sweet. I grew up with my Grandmother's Irish scones and didn't like them much. As a result I avoided scones until I had something rather delicious and asked what it was. It turned out to be an English scone, which is what most American's think a scone is.