Brown the Italian sausage over medium heat, and be sure to drain the fat.
Once the sausage is fully cooked, remove from the heat, and set aside.
Preheat oven to 350 degrees Fahrenheit.
In a medium bowl mix cream cheese, sour cream, Italian seasoning , Parmesan cheese and 1 cup of mozzarella cheese together.
In a 9 inch round baking pan layer in the following order: cream cheese on the bottom, sausage over it, diced tomatoes, pizza sauce, remaining mozzarella cheese, and pepperonis.
Bake for 20-25 minutes, or until cheese is bubbly.
Serve & enjoy with chips or crusty bread!