Like (it seems) a lot of people, my friend and I stumbled upon Crêpe Café while exploring Vieux-Montréal. I had fromage grillé (grilled cheese for les americains), which was served with a small cup of white sauce, I believe. Fantastic. The sauce, well used in French cooking, added a nice spin from the grilled cheese I've become accustomed to in the States.
Definitely a classy place for lunch, and dare I say a less expensive option for the Old Port. The staff, while bilingual, also were patient with my still-improving French!