De Markten is a place I mostly visit in summer time. When the weather is nice, the big terrace beneath the beautiful trees is an ideal place for a quick lunch with colleagues. Food is simple but decent. Do try the recommendations which change often. Also a lovely place to just have some drinks with friends. The service can be a bit chaotic, but the prices are low, so definitely worth your money.

De Markten Cafe, Rue du Vieux Marche aux Grains 5, Brussels 1000, Belgium
http://www.demarkten.be/
+32 2 512 34 25

Visited April 2015. You can find my review about De Markten Cafe also on TripAdvisor. My scores: value 5/5, service 3/5, food 4/5.