I'll dig up my notes when I get home for some excellent places to indulge in food.
For starters.... If you want an AMAZING dining experience check out Le Pre Catelan
which is right in town, but in an amazing park. Hands down one of the most incredible gastronomy experiences you will ever enjoy.
Another link for Lenotre with Pre Catelan
Oh yeah, and be prepared to drop some bills for dinner...
will absolutley friggin knock your socks off. If you are into raw milk stuff, you'll be in heaven.
As far as Brussels goes, the TGV & Eurostar leave from Gare Du Nord a few times daily. The ride takes about 90 minutes