That sounds like stoofvlees, which is something that my Mom and I will make occasionally. It's super yummy. You can put it on fries, potatoes, pretty much anything.
It's actually a common misconception that Belgium is French speaking. The country is divided by language. More than 60% of the country is Flemish speaking, and only 33% of the country is French speaking, with the remainder being German speaking. However, the French side ran the government for so many years, and actually didn't even ALLOW Flemish speakers to even be represented in government. That happened in more recent years. Add to the fact that when the French go to the Flemish speaking side, they refuse to speak Flemish. It just adds to the misconception. Ultimately, they're kind of stuck up.

It's a huge issue in the country still. They really don't like each other very much.
My Mom did speak fluent French when she lived there, because it was a requirement that they begin learning it at the age of 5 in school. However, she stopped using it when she came here, and since it wasn't her first language, she lost a lot of it. She understands a lot though, just can't respond.
I'm not sure what booyah is. But I looked it up. She doesn't make anything like that, she made a form of goulash for years, but not that.
Me too! I'm looking forward to taking even more on my Mom's and my upcoming trip.
It's a fun fact. Most people would have no idea, because she speaks with no discernible accent at all. She was made fun of when she moved her, so she took speech correction.
Seriously though, my Mom makes the best fries ever.