For a relaxing Saturday brunch, try the St. Lawrence Market (Jarvis / Front). I would recommend either the churrasco style chicken (upstairs), the Canadian back-bacon sandwich (upstairs), or the breaded eggplant (downstairs at Mustachio). Unfortunally, it is a market environment, and there is no "proper" seating and service. Still, wonderful area to include in your stroll on Saturday during the day.