Truffles in Toronto?
I know that this isn't exactly what you're looking for, but at gourmet food stores you can get Truffle Oil. It's pricey, (mine was $30 for 50ml), but it goes a LONG way. Try adding a light drizzle to mashed yukon golds. I know it's hard to do, but go easy on the roasted garlic and cream as they soften the flavour. Feel free to make up for it with butter. Similar to Ed's Baboo dish, this one is 3 ingredients, simple and memorable.
This is a great question that I'd be very much interested in hearing the replies to as well.
Last year, I had a meal at Babbo in NYC. They brought us this big bowl of brown-butter tagliatelle and shaved this enormous white truffle (the size of a fist) all over the top. 3 ingredients. Best dish of my life. Truffles are magical things.
Romagno Mia at Front & Jarvis serves a very good truffle risotto. The waiter flambes a big wheel of cheese (asigo? I don't remember) and mixes the risotto in the pool of melted cheese. He finishes with generous shavings of truffles all over the risotto. Last time I was there, I was informed that since fresh truffles were out of season, they had to make do with frozen ones. I assume that means they use fresh ones in season when available although you may want to call ahead to confirm. I had "truffle breath" hours after the meal (not that I mind). :)