Preheat oven to 450 degrees. Divide into 12 equal portions.
Grease 12 regular muffin tins. Sprinkle a small amount of cornmeal in the bottom of each tin, then spread a portion of dough on the bottom and up the sides of each.
In a small frying pan over medium heat, cook bacon and onion until bacon is browned.
Combine cooked chicken, bacon, onion, barbecue sauce, and ketchup in a medium bowl. Stir to combine.
Divide chicken mixture evenly among muffin tins. Top with mozzarella cheese, divided.
Bake at 450 degrees for 10-12 minutes.