If Indian food is not too adventurous for your dining companions or yourself, I would HIGHLY recommend Dhaba, located at 309 King St W.
Every time (and I mean every) I am in Toronto, I make it a point to go there. The food is amazing and authentic. To make my point, I have a friend how emigrated from India 15 - 20 yrs ago. When I took him there, his comment was simply, "I miss this food..."
If you do go, and are not up on the different dishes from India, I recommend the sample Prix Fixe menu. Its amazing and you will not be dissapointed.http://www.dhaba.ca/home.php