Here are some suggestions for your Saturday lunch, all in reasonable walking distance of Sutton Place Hotel:

Dynasty: http://www.toronto.com/infosite/146976/

Flow: http://www.toronto.com/profile/873254/

Pangaea: http://www.pangaearestaurant.com/

Prego Della Piazza: http://www.toronto.com/profile/147093/

Holt's Cafe: http://www.torontolife.com/cityguide/listing.cfm?listing_id=6303

Hope that helps, Linda