1. Brown and drain ground beef.
2. Return ground beef to skillet, add pizza sauce and pepperoni. Stir until mixed.
3. Cut roll approximately 1/3 from the top. Carefully hollow out the bottom of the roll, leaving a 1/4 shell.
4. Sprinkle 2 tbsp cheese into each shell.
5. Fill each with 1/2 cup meat mixture.
6. Sprinkle with remaining cheese; gently press down to flatten.
7. Replace bread tops.
8. At this point, sandwiches can be individually wrapped in foil and frozen for up to 3 months.
9. To serve immediately, place sandwiches on a baking sheet. Bake at 375 degrees for 15 minutes or until heated through.