I stayed at the Hilton Mississauga/Meadowvale and had dinner and breakfast at Quest. It's practical, tasty, and you can choose from multiple options (gluten-free or veggie).
The food is really good and the portions are copious. Service is also good, although it was better last time I was there (in January). I also feel it's a little bit overpriced if you don't have one of these 15% off vouchers.