Go to Szechuan Express. Just make sure what you get is fresh. I always look for what's fresh before ordering. Ruby Thai and A&W would be my second choices. If you want salad and protein - maybe consider Jimmy The Greek. I tried the Big Smoke across from Toronto Metro Library and it was good. I never tried the one at Eaton Centre, but that might be a good choice too. I hate the KFC here. It's never fresh.
For visitors, the Urban Eatery is basically a food court.