The best Philly cheesesteak in Toronto is a sinfully greasy, lowbrow import from south of the border that owes its deliciousness to the simple and straightforward combination of griddled rib eye, oozing cheese (preferably provolone and/or Whiz) and a soft squishy bun.
Purists and expats might argue that the only acceptable preparation options are wit' onions or wit' out, but, here in Hogtown the addition of a fried egg, onion ring or even kimchi is something to be celebrated...then devoured.
Here is a list of where to find the best Philly Cheesesteak in Toronto.
See also:
The best sandwiches in Toronto
The best late night sandwiches in Toronto