Loosely cover the frozen bread dough with plastic wrap. Allow the dough to thaw for a few hours at room temperature. When the dough is completely thawed it will be slightly puffed up.
Here's a tip: Spray the plastic wrap with cooking oil, or brush it with cooking oil and lay it, oiled side down on the bread dough. This allows the bread dough to rise and move easily under the plastic wrap without it sticking or holding back the dough. Cook and crumble bacon.
Roll dough out to an approximately 11 x 11 inch square. One frozen dough log makes one pepperoni roll.
Brush dough with olive oil or whatever cooking oil you prefer. Lay pepperoni on the dough covering entire surface. Sprinkle with shredded mozzarella cheese.
Next, sprinkle it with shredded Parmesan cheese and lightly sprinkle it with Italian seasoning. Add a sprinkling of garlic salt (optional).and add crumbled bacon and finely diced onion if so desired.
Roll up the dough starting at one edge of the square.
Place rolls on baking sheet, leaving space between them if you are making more than one roll. Brush some melted butter on top of the uncooked pepperoni roll(s).