Authentic St Patrick’s Day Meal?

I learned some things I didn’t know about the day recently, such as the shamrock originally representing the Holy Trinity rather than luck and how the modern-day leprechaun wasn’t always so positively celebrated in the US.

I’ve heard corned beef is an American preference rather than having Irish roots. I was wondering, what is the authentic version of a traditional St Patrick’s Day meal that your great-grandparents might’ve made? I’ve read suggestions of lamb stew, bread, and colcannon but would love to hear personal memories from people!