What does it take to relocate, and reimagine, a classic? Chef Carmen Quagliata of Union Square Cafe is about to relaunch the venerable Manhattan restaurant, after three decades in its original location. Carmen shares what it was like taking over the kitchen at this New York City institution when he first came on board about a decade ago, and the nuts and bolts of shutting down, then reconstituting, Union Square Cafe in its about-to-debut new home.