next time you’re in downtown memphis, the burger of choice may very well be the four-pounder at kooky canuck on 2nd street, just around the corner from the main entrance to the peabody hotel. finish the four-pounder in 60 minutes — or bring a friend and polish off a six-pounder — and you’ll find yourself not just full, but famous, with your picture hung on the canuck’s wall of fame. if your appetite isn’t quite that big, their regular burgers measure up to a measly half-pound. while you’re waiting for yours, the canuck has a few appetizers that you will find interesting: the poutine, a dish of hand-cut fries mixed with white cheddar cheese curds and smothered in tasty brown gravy, differs from the french canadian original only in its size, which is big enough to mush a dog sled all the way from quebec to vancouver. the fried green tomatoes are asgoodas you’ll find anywhere, although they