Preparation Blend first 8 ingredients in processor until mixture is finely chopped. Using tip of small sharp knife, make about twenty 1 1/2-inch-deep incisions all over pork loin. Press 1 generous teaspoonful of pancetta paste into each incision. Rub remaining paste over outside of pork. Arrange bay leaves in bottom of roasting pan. Place pork loin atop bay leaves. Cover; let pork stand at room temperature 2 hours or refrigerate overnight. Preheat oven to 375°F. Sprinkle pork with salt. Roast 45 minutes. Pour 1 1/2 cups stock into pan. Continue to roast until thermometer inserted into center registers 155°F, adding more stock if it evaporates and basting pork with juices occasionally, about 45 minutes longer. Transfer pork to cutting board. Discard bay leaves. Transfer pan juices to small saucepan. Skim fat from top of juices; boil until liquid is reduced by half, about 4 minutes. Cut pork into 1/2-inch-thick slices. Transfer to platter. Pour juices over. Surround with fennel and lemon wedges (squeeze lemon over fennel at table).
Preparation Blend first 8 ingredients in processor until mixture is finely chopped. Using tip of small sharp knife, make about twenty 1 1/2-inch-deep incisions all over pork loin. Press 1 generous teaspoonful of pancetta paste into each incision. Rub remaining paste over outside of pork. Arrange bay leaves in bottom of roasting pan. Place pork loin atop bay leaves. Cover; let pork stand at room temperature 2 hours or refrigerate overnight. Preheat oven to 375°F. Sprinkle pork with salt. Roast 45 minutes. Pour 1 1/2 cups stock into pan. Continue to roast until thermometer inserted into center registers 155°F, adding more stock if it evaporates and basting pork with juices occasionally, about 45 minutes longer. Transfer pork to cutting board. Discard bay leaves. Transfer pan juices to small saucepan. Skim fat from top of juices; boil until liquid is reduced by half, about 4 minutes. Cut pork into 1/2-inch-thick slices. Transfer to platter. Pour juices over. Surround with fennel and lemon wedges (squeeze lemon over fennel at table).