Restaurant with oysters menu and bday dinner? (Brussels)

Hello all,
I would like to ask if anyone have recommendation for a nice restaurant in Brussels where we can find oyster/belgian dishes? My friends are coming to town and I want to take them out to some nice place, and also it would be a bday dinner. So I would like to find a nice venue which can hold a table of Protected content . Please let me know if you have any ideas?
Thank you in advance.
Amanda