Preheat the oven to 375.
In a large bowl combine softened cream cheese, parmesan cheese, garlic, Italian seasoning, and 1/2 cup shredded mozzarella. Stir until everything is well incorporated.
Spread the cream cheese mixture in the bottom of a pie pan or a square baking pan.
Spread sauce across the top of the cream cheese layer.
Sprinkle remaining cup of mozzarella over the sauce.
Spread pepperoni slices evenly across the top of the cheese.
Add additional pizza toppings if desired.
Bake for 25-30 minutes or until cheese is well melted and bubbly.
Serve warm.
Keep any leftover dip wrapped in plastic wrap or in an airtight container in the refrigerator.