This 
handsome roast elicited oohs and aahs in the 
test kitchen when food editor Maggie Ruggiero pulled it out of the oven, and the succulent meat  disappeared in a flurry of forks. The rosemary, thyme, sage, and savory sprigs on which the pork loin roasts infuse the meat  and mingle with its mustard and shallot cloak. The luscious sauce is argument enough for keeping a bottle of dry vermouth on hand.