One of the oldest tricks in the healthful-cooking book is to use spices liberally--a ruse our Test Kitchen updates with its intensely flavorful braised pork loin. After a fragrant five-spice and garlic-powder rub, the lean meat is splashed with orange juice, rice vinegar and a smidgen of dried prunes to sweeten the deal. Followed by a stovetop braise, slices of the pork taste precisely as an autumn main course should: savory, warm and aromatic. Abracadabra.