We enjoyed our meal at In't Klein Stadhuis. Its a busy restaurant (suggest you book) with a great atmosphere. The food was lovely although I would suggest that you share any appetisers you might order as the portion of salami & spring rolls we were presented with were huge !
We ordered a mix of steaks, fish pie and the flemish stew and the food was lovely. We didn't have any room for dessert but did manage a couple of bottles of their Tempranillo. Along with water and some soft drinks the bills came to 198 Euros so not cheap but plenty of food ! Good service from the team and in particular Benaming.
The restaurant is located in the main square and about a 5 mins walk from the Menin Gate.
An enjoyable dinner.