Had a very solid dinner at Didier recently. Started with the escargot (the sauce is super buttery and amazing), and had the tartare as the main. Very well seasoned, but if you prefer your tartare unseasoned or not dijon-y you should probably order something else. Steak and frites were also ordered, and while I'm not a big fan of heavily sauced steaks, Didier does this great onion garnish that goes well with their steak.
Lastly, the souffle. Smells and tastes amazing, if you like souffle you have to order this here. I think the flavours change (not sure how frequently) but luckily I got the salted caramel night. Delicious.