The Brew Cafe Sandwich Bar is at the western end of Paul Street and is open all day. Go in for a cup of coffee like I did and you can study the breakfast and lunch menus and they also do take-out.
It was mid afternoon when I called and the lady was tidying up after the lunch. I enjoyed my cup of coffee (and wrapped biscuit) for €2.25. Actually quite a few people enjoy their visits here and their good food and service sees them take a slot in the current Bridgestone Good Food Guide.
Check out my review of Brew Cafe - I am cork - on Qype