About a month after Pat & Fran’s Irish Pub Nov. 27 opening, a petite, elderly customer ordered a Guinness and the corned beef dinner. An Irish coffee finished off her meal. Before she left, the woman told co-owner Nick Carroll that she hadn’t eaten corned beef that tasty since the death of her parents, both Irish immigrants.“That made my day,” said Carroll, who also is of Irish descent.The first Carroll in his family to emigrate from Ireland arrived in the United States in 1867, landing in Iowa three years later.