The food is good not too healthy but it's worth the cost to try ! The gyros and the chocolate lukumades (Eolou 21, & Aghias Irinis Str, Athina 105 51, Greece).
If you want to enjoy a very good and cheap brunch (Plakaki Cafe / Pl. Filomousou Eterias 2, Athina 105 58, Greece).