Toronto is generally considered to be one of North America's top food cities. It has the same variety as New York or San Francisco and the compact and safe downtown keeps them closer together. As one of the most (if not the most) multicultural cities in the world, Toronto has authentic ethnic cuisine like no other city in North America. It is easy to eat out in Toronto and have a superb meal for cheap.
Surrounded by the extensive fertile farmlands of Southern Ontario, Toronto has an abundance of farmer's markets - one is happening, in season, almost every day. Several markets are year round, while others are seasonal, generally running from May to October.
In Yorkville it's more about being seen than actually eating but there are a few hidden gems - Toni Bulloni is an Italian spot. Sushi Inn is one of the most popular (though decidedly low-end) sushi restaurants in the city. The Coffee Mill is a Hungarian bistro with a surprisingly varied menu. Yorkville, an area famous for sightseeing celebrities, often charges premium for otherwise mediocre meals. Mere 1 subway stop away from Yorkville, a meal of similar size and quality can be purchased for nearly half the price.
Source: Wikitravel. A list of contributors is available at the original article on Wikitravel.