I managed to miss this last year. Hopefully I'll get to it this time.
http://www.tastefestivals.ie/index.php?option=com_content&task=view&id=60&Itemid=76 And on a similar subject, but sooner:
http://www.dublindocklands.ie/maritimefestival/The food market is excellent. (Or at least it was in previous years.)