Directions
In a large skillet over medium-high heat, brown the ground beef.
Add the minced garlic, crispy fried onions, salt, and pepper, and cook for another minute until fragrant.
Drain any excess grease from the pan.
Transfer the cooked beef mixture to a bowl and allow it to cool slightly.
Stir in the 2 cups (480 ml) of shredded mozzarella cheese until well combined.
Grease the insert of your slow cooker with butter or non-stick spray. Press the beef and mozzarella mixture firmly and evenly into the bottom to form the crust .
Pour the sugar-free pizza sauce over the beef crust and spread it into an even layer.
Sprinkle the 2. 5 cups (1200 ml) of shredded cheddar cheese over the sauce, then arrange the pepperoni slices on top.
Cover the slow cooker and cook on LOW for 3 to 4 hours, or until the casserole is heated through and the cheese is completely melted and bubbly.