The only BBQ I've gotten in NL is Phrom Phubar & Padawan and other Dutch individuals at a really great Bash they had. Other than that, I don't know of any restaurant BBQ out that way, but it's been a couple years since I've been.
Lots of other great food for sure though - Surinam, Indonesian, Fish restaurants, the fries are incredible - especially at a place called Vleminckx. It's a little window in a wall and if you go there, you'll be glad you did. There's a really great Chinese restaurant called New King, conveniently located in the Red Light District.