My Pizza Peel -- and yes, that's the real name (a pizza peel is the long-handled shovel used to pull a pie out of the oven) -- opens today, right on the side of the Magnolia Hotel, at 1645 Stout Street, with a slogan on the sign that promises "A Slice of New York."And today, My Pizza Peel is serving up a very generous slice. From 10 a.m. (when the doors open) until 6 p.m., My Pizza Peel will offer every customer a free slice (with soft drink) as part of its "Take a Slice Out of Homelessness" eff