I'm pleased to see Le Grand Cafe in Brussels is still in business since the 80's when I ate there.
Hey, I might just go there again! I also noticed that the place was packed with locals. My travel agent friend and I enjoyed our dinner and it didn't cost an arm and a leg. Dining al fresco is also available. Sorry, but I don't know if it's in the district your daughter will be staying in.
I can't find a website for the cafe, but here's a link and it's also on FB.