@ZivBnd
This is a Michelin-starred restaurant in Piraeus.
If you’re up for a splurge, I love the breakfast buffet at Le Grand Balcon in the St George Lycabettus hotel. It’s located in Kolonaki, an artsy upscale district with galleries and coffee shops.
https://www.sgl.gr/experience/le-grand-balcon
If you like museums, the Benaki museum has a nice collection.
The Electra Palace Hotel in Plaka also has a nice breakfast. I prefer the location of the St George Lycabettus Hotel, but the Electra Palace is a nice place to stay. https://www.electrahotels.gr/hotels/electra-palace-athens/