Line large baking sheet with parchment paper. Lightly flour work surface. Place thawed dough on floured surface; lightly flour top of dough. Flatten dough with hands, then using a rolling pin, roll dough into a rectangle, about 1/4 inch thick. Add extra flour, as needed, to prevent sticking.
Top dough with sliced pepperoni, spoon pizza sauce over pepperoni. Sprinkle mozzarella cheese and Italian seasoning over top, leave a one inch border around edges.
Brush the edges of the dough with water.
Roll up the dough, making sure to tuck in the sides. Place filled dough on prepared baking sheet. Brush the top and sides of filled dough with olive oil. Make 4 to 5 slashes in the top of the bread.
Bake for 25 to 35 minutes or until dough is golden brown.