We had dinner at OSE in early May.
We were served the same amuse “bouche” onz showed in his review.
My wife had a refreshing cold pea soup starter. My starter was a very nice raw fish with veggies.
We both had the fish main, with lots of veggies, a light butter sauce and some foam. Quite tasty.
My wife’s dessert and my cheese course in lieu of dessert were good but not memorable.
Prices have “skyrocketed” here since onz last report - from 43E to 44E for our entrée-plat-dessert! 
Perhaps not a destination (though we took a short metro trip to go to it - followed by a lot of stairs getting into / out of the station) in the same league as the almost as well-priced Brion, but a very worthy restaurant with great qualité-prix.
