You can find the best Toronto wine restaurants, defined as restaurants with top quality wine cellars, in an extensive North American restaurant database which is maintained by Wine Spectator. There are three levels in their awards program. They are the Grand Award (GA), the Best Award of Excellence (BAE), and the Award of Excellence (AE). Click on Wine Spectator and put Toronto in the Search box to see the entries for it. If the link doesn’t work, click on Restaurants and then Search 202X Winners.
If you are just interested in sampling a variety of interesting wines, check out Toronto wine bars