Preheat your oven to 350°F (175°C).

In a large mixing bowl, combine the cream cheese, sour cream, and mayonnaise. Blend until smooth and creamy.

Stir in the chopped pepperoni, green olives, roasted red peppers, and half of the Parmesan cheese until well incorporated.

Transfer the dip mixture into a medium-sized baking dish and spread it evenly.

Sprinkle the remaining Parmesan cheese generously over the top.

Bake in the preheated oven for 20-30 minutes until the edges are golden and bubbling in the center.

Remove from the oven and let cool for a couple of minutes. Serve warm with dippers.