Having pioneered using gooey sandwiches as burger buns, the Grilled Cheese Grill is innovating once again with Shotgun Sub Shop, which packs meats and cheeses into fresh-baked pretzel buns for the namesake Shotgun Italian, the Road Runner w/ roast beef & Tillamook cheddar, and the turkey, bacon & artichoke Omar, who's presumably bringing a shotgun of his own.