Based on the recent reviews of JoelF, I visited Plateia yesterday early evening.
I have to say, based on a single meal for two, Plateia is very nearly as good as my favorite, Psistaria, and in some respects, I think a little better.
Certainly the current outdoor patio dining was superior. Table spacing was excellent, and despite yesterday's 90+ temperature, the patio was well shaded and breezy. Waitstaff all seemed to conform to the COVID-19 restrictions, even if many of the patrons couldn't manage the latest Pritzker dictate. I confess that I felt safer dining here than many other outdoor setups I've seen the past months.
But the key was the food. I always try moussaka at any new Greek restaurant that I try, and the moussaka here was served in a casserole style large ramekin. It looked absolutely beautiful, and tasted authentic. The ground meat was not oily, and the bechamel was well executed. I confess, I found it slightly better than the moussaka at Psistaria. My dining partner had the Lavraki (Sea Bass / Branzino ) and it was very good as well, clearly a quality filet, properly prepared and moist, served with grilled vegetables (pepper and eggplant). I couldn't really imagine this dish being better prepared, the natural flavors shone through. We were eating early, so our only appetizer was saganaki (she was visiting from Washington DC, and it appears that no restaurant there actually offers it!), and it was just fine. After all, how can salt, fat, and flamed Metaxa be bad?
Dessert was baklava, a single serving was enough to share, and it was consistent with this area's better examples. We each had a glass of assyrtiko, and for overly priced restaurant wine, it went extremely well with the Lavraki, and was fine with the moussaka.
All in all, this was a very solid performance and well worth a visit. I thank the prior reviewers for this recommendation; in essence, I second it.