Preheat oven to 350 degrees F.
Begin by melting the room temperature cream cheese over low heat on the stop top. When the cream cheese is melted, add the marinara sauce until it is completely incorporated.
Slice up all of the pepperoni (except for what you will use on top) into quarters and add to the cream cheese and marinara mixture.
Stir in 1 cup of the cheese and the Italian seasoning until they are melted together.
Spread your mixture into a non-stick dish (I used a 9" pie pan) and spread it out so it's even.
Top with remaining mozzarella cheese and pepperoni. I also decided to add a bit more Italian seasoning on top, but that is optional!
Baked for 18-20 minutes. If you would like a browned crust on top, set your oven to broil and watch it carefully so it doesn't burn for an additional couple minutes.