Roasting a whole turkey breast, rather than an entire bird, offers a few clear advantages. It cuts roasting time at least in half, reduces the hassle of carving, and frees you to create more interesting side dishes. But perhaps the best argument for roasting a breast is that you can produce white meat that is truly moist, as opposed to the dried-out white meat that results from roasting a whole turkey until the legs are cooked through. (Photo: Melina Hammer for The New York Times)