In a large bowl combine the water, active sourdough starter, and salt. Add the bread flour and mix until no dry flour remains. The dough will be shaggy and sticky.
Cover the bowl and let the dough rest for 30 minutes at room temperature.
With wet hands perform one set of stretch and folds, grabbing one side of the dough, stretching it up, and folding it over itself. Rotate the bowl 90 degrees and repeat until you have worked all the way around the dough.
Cover and bulk ferment at room temperature for 10 to 12 hours, or until the dough is bubbly, has grown noticeably, and has a slightly domed surface. Exact timing will depend on your kitchen temperature and starter strength.
While the dough ferments, make the BBQ sauce. Whisk together the ketchup, brown sugar, apple cider vinegar, Worcestershire sauce, mustard powder, onion powder, garlic powder, smoked paprika, and cayenne in a small saucepan over low heat. Cook for 5 minutes until combined and slightly thickened. Set aside.
Make the smoked cheddar coating. Add the shredded smoked cheddar, cornstarch, and dried parsley to a food processor. Pulse until the mixture resembles finely grated Parmesan with no large shreds remaining. Transfer to a shallow bowl and set aside.
Line a 9x13 pan with parchment paper. Combine the melted butter and oil in a bowl and set aside.
Turn the proofed dough out onto a lightly oiled surface. Pull off a golf ball sized piece of dough and roll it into a smooth ball. If the dough is sticky, lightly oil or wet your hands to help.
Dunk the ball fully in the butter and oil mixture, coating all sides.
Roll the dunked ball immediately in the smoked cheddar coating until fully and evenly covered. Place in the prepared pan. Repeat with the remaining dough balls, you can arrange them in a wild manner or a 4 x 5 grid in the pan.
Cover the pan loosely and let proof at room temperature for 1 to 2 hours until the balls are puffy, bubbly, and have expanded to nearly fill the pan.
Preheat your oven to 425F (220C).
Once fully proofed, press about 1 tablespoon of smoked pulled pork into the center of each dough ball, dimpling it down into the surface.
Bake for 20 minutes until the cheddar coating is golden and set.
Remove from the oven and spoon a small amount of BBQ sauce over each ball. Sprinkle the shredded cheese blend evenly over the top.
Return to the oven and bake for an additional 10 to 15 minutes until the cheese is fully melted and bubbly.
Optional: Broil for 1 to 2 minutes for golden, browned cheese spots. Watch closely as it can go quickly.
Serve hot straight from the pan.