I need recipes for dessert after corn beef and cabbage

Bailey's Irish Cream Cheesecake perhaps?

Something light and lemony? Two ideas:
http://food52.com/recipes/1374-lazy-mary-s-lemon-tart
http://food52.com/recipes/16407-tartine-bakery-s-lemon-cream

Guiness cake, bread and butter pudding, or a steamed apple pudding.

How about something light and citrusy like contest winner Almond cake with orange flower syrup -http://food52.com/recipes/4362-almond-cake-with-orange-flower-water-syrup