Cut your roast in half lengthwise and unfold it open like a book. Put it in a roasting pan and pour the apple cider over it. Inject some of the cider into the roast at 1" intervals. (this takes approximately 1 beer). Set aside.
Prepare the stuffing: Mix all ingredients together in a large bowl, making sure all bread is moistened with the apple cider. Spoon approximately half of the stuffing onto the center of the pork, wrap the remaining in a foil packet.(another beer).
Fold over one side of the pork so that the stuffing is now in the middle of the meat. Tie with butcher twine. Put the roast back into the pan and let marinate for a few hours or overnight.
Cooking instructions: Preheat your coals, or gas bbq if that's what you have. If using coals: Separate coals to either side of bbq leaving a space in the middle. Put roast directly over coals on one side, fat side down. Let roast this way until seared,(approx. 1 beer) then turn over and place roast in center of bbq, over the space, between the 2 beds of coals. Let roast until internal temperature reaches 170 with meat thermometer (approx 3 hours or 6 beers).
If using gas bbq: After preheating bbq, put roast on fat side down until seared (approx. 20 mins). Turn off one burner and turn the roast over placing over top of side with burner "off" Turn other burner down to "low". Put foil stuffing packet on bbq with roast. Roast until internal temperature reaches 170 with a meat thermometer. (approximately 3 hours).
Cut strings, scoop out stuffing and slice roast into 3/4" thick slices.
Mix stuffing with stuffing from packet and serve separately ( or with beer).