01 -
In a skillet, brown the ground beef evenly, then carefully drain the fat.
02 -
Place the browned beef into the base of the slow cooker, spreading evenly.
03 -
Mix the pizza sauce and halved pepperoni slices, then fold gently into the beef.
04 -
Set the slow cooker to low heat for 3 hours to allow flavors to meld.
05 -
After 3 hours, sprinkle the shredded mozzarella evenly over the beef mixture.
06 -
Cook for an additional 30 minutes, or until the cheese is fully melted.
07 -
Serve the beef mixture over the rolls, topping each with a mozzarella cheese slice.