I noticed that many of the attractions open on Sundays in Dublin aren't open until noon or later (National Museum, National Gallery, Dublin Castle, etc.). My first day in Dublin is free until late afternoon, when I join up with a RS tour group. Aside from a leisurely walk around town, any suggestions how to spend a Sunday morning? Any good breakfast spots to recommend? I'm staying near Christchurch (mid-May).
The "Queen of Tarts"is a great place for breakfast,lunch or an anytime snack. It is on Dame street about a five minute or less walk from Christ Church.
"Lemon" on South William Street in Dublin is really good for breakfast (and not very expensive). Excellent crepes and even though it is your first day, you're going on a tour and will have more than enough time to have a traditional full-Irish breakfast out in the countryside. There's only so much blood sausage and fried eggs you're going to want to eat anyways...
Otherwise, look into getting some nice bakery items (Marks & Spencer on Grafton St has an excellent food hall) and park yourself on a bench in Merrion Square or St. Stephen's Green and people watch while you eat.
No idea if they offer the tour on Sunday morning, but the crypt under St. Michan's Church is something totally different, it costs hardly anything and it's a very quick tour (maybe 20 minutes) so you still have lots of time to see other sights.