Heat the bacon grease in a large skillet until hot.
Then add in the garlic and sauté for 3-5 minutes
Add the ground beef into the skillet, stirring the garlic into the meat. Cook on medium heat for 15 to 20 minutes, or until the meat is well cooked.
Be sure to drain off any excess oil when the meat has finished cooking.
Mix the crushed tomatoes, Italian seasoning, salt, black pepper, and pepperoni into the meat, stirring until combined.
Let the pizza sloppy joe mixture simmer for a good 5-10 minutes.
Finally, top the meat with the shredded mozzarella right in the skillet and let it begin to melt.** Then stir the melted cheese into the meat mixture.
Serve on toasted buns or on a bed of lettuce or spinach.