Dumon
Wilgen 1
with the kaizer karel signs on veemarkt has reasonable pub food.
Hete Patat
Nieuwwerk 1
Has some turkish inspired cuisine. they specialize in stuffed potatoes of many varieties. they are conveniently located just behind the cathedrale off of the grote markt. (http://www.hetepatat.be/)
De Cirque
Vismarkt 8
On the vismarkt, offers pasta, steaks and salads. no english menus are available,applies to mechelen generally but staff are helpful and will translate.
Soep Sjop
On the bruul not far from the river has home-made soups and sandwiches.
De Maneblusser
Onder den toren 7 just opposite the cathedral tower offers filled sandwiches at 2-4 eur each.