Have been eating at Graceful for several years now though not as often as I like. IMHO it is the best vegetarian dim sum in the GTA. Service is impeccable, very gracious and efficient. Prices are a bit high but you get what you pay for.
Definitely try the mock chicken satay. It is amazing. Hot and sour soup, the red type, is also very good. I like how they have replicated a lot of typical dim sum dishes.