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The North Shore Roast Beef Sandwich doesn’t technically hold a Protected Designation of Origin, but that’s just a formality. A “super beef” proffers thinly sliced, rare roast beef piled high into a soft, griddled onion roll. It can be spread with mayo and finished with barbecue sauce and a slice of American cheese for a “three-way”; topping non-purists can also add lettuce, horseradish, or mustard. There are a few outposts outside of the North Shore where truly authentic versions of the sandwich can be found, but there might be something in the air north of the Zakim that just makes these sandwiches taste better. For the full experience, you can’t beat the original—visit Kelly’s Roast Beef on Revere Beach, where they’ve been serving up the sandwich since 1951.