Prep the shells the night before or at least 5-6 hours before cooking. In a bowl, combine breakfast sausage, ground turkey(or lean ground beef), Peperoncini peppers(optional), garlic-herb seasoning, salt & pepper, and shredded cheese.
Fill the Manicotti shells with the meat mixture.
Wrap each shell with bacon. (NOTE: you can use 2 pieces of bacon on each if you want)
Place them in the tray that came with the Manicotti box. Place the trays on a sheet pan. Cover with foil and stick in the fridge overnight or 4 hours before cooking.
Preheat the pellet grill to 260°. Smoke the shells for 1 hour and 45 minutes.
Take them out of the pellet grill and place into a sheet pan.
Brush each shell with BBQ sauce.
Broil for 5 minutes.
Take them out of the broiler. Cover with foil and let it cool for another 5 minutes.
Slice each shell into thirds.