We had heard of Cassis, just never got around to visiting. A nice greeting to start with was a nice start. We both had a cocktail (both were very nicely made) and escargot. They weren't quite traditional - served on mushrooms, with spinach, but very tasty. Just enough garlic and gratined with breadcrumbs. My partner chose the Duck confit - which was superb, and I had a Wagyu entrecote, also superb. We finished up with soufflé which are the speciality of the house.
Overall we couldn't fault the food. You can bring your own wine, but the corkage is IDR 300,000 which is expensive - but if you have a really nice bottle it is worth it. The wine list is extensive and no more unreasonable than any other in Jakarta.
Service was attentive and timing of the food as we expected. A very good meal indeed.