Anu
If we’re only in Athens for the odd night we generally just pick up a bread ring for breakfast. Having said that there are a couple of nice bakeries in Psyrri which are worth checking out.
To koulouri tou psirri actually bakes quite a lot of the bread rings that are sold in the street. They are in Karaiskaki about 5 minutes from Monastiraki metro. They have a web site but as far as I can see it’s only in Greek
http://tokoulouritoupsirri.gr/
The Little Kook, in the same street, is worth a look. No idea what the food is like but it’s the most extravagantly decorated place I’ve ever seen!
Further into Psyrri is the Bakery 1907 which has a little breakfast room. The bread from there is excellent and everything else looks very nice. It’s on the corner of Agias Anargirion and Sarri.
You can find both of these on Google maps. The area is worth a wander anyway.
Cheers
Alan