Preheat oven to 350˚F. Mix grated cheese and eggs. Sprinkle mixture with garlic powder, salt, pepper and oregano. Set aside. Split thawed dough in half. Roll out dough in a rectangle on an oiled board. Brush with butter.

Brush dough with Parmesan cheese mixture, keeping it away from edges. Place pepperoni on dough, overlapping pieces; cover completely. Sprinkle mozzarella cheese on top of pepperoni; do not put cheese too close to edges. Roll dough up as tightly as possible. Seal all edges, using toothpicks to hold together if necessary. Repeat with second portion of dough. Brush remaining cheese mixture on top of the loaves; place on cookie sheet and bake for 20 to 25 minutes.