I can claim my celtic heritage today, on St Patrick’s Day. I will not give you any Irish Receipe or Beer suggestion though.
If you are dying for a very rich cake from Brittany 
and feel like baking check this Kouing Aman recipe on Epicurious. The name means ‘cake made with butter’ and is said to have been invented by a fellow named Scordia of Douarnenez around 1865.
You can wash it down with some authentic bretton apple cider. Being even more adventurous try Chouchen , hydromel otherwise known as the drink of the gods (or druids).
Technorati tags: serge the concierge, st patrick’s day, celtic, brittany, kouing aman , druids, chouchen