I am sure I am forgetting the correct Irish names, but I was asked to do a brunch for St. P's day a few years back. One of the of the dishes that went over well was a smoked cod cake. Basically some (tasty!) smoked cod flaked with a traditional fish-cake binder-egg combo garnished with a poached egg. I also recall the dessert being a traditional apple cake. It resembled the 'dome' of an apple muffin with some clotted cream. Hope this helps!