L'Ogenblik
This split-level restaurant, on a side alley off the Galeries Royales Saint-Hubert, has all the trappings of an old-time bistro: green-shaded lamps over marble-top tables, a forest's worth of dark wood paneling, and laid-back waiters. There's nothing casual about the French-style cuisine, however: grilled sweetbreads with baked courgettes, mille-feuille of crayfish and salmon with a puree of langoustines, and saddle of lamb with spring vegetables and potato gratin. The selection of Beaujolais is particularly good.