In a 9” oven-friendly skillet over medium heat, add the onion and garlic and drizzle a good stream of olive oil. Cook 3 to 4 minutes, stirring. Pour into a large bowl.
Add the cream cheese, mayonnaise, spices, season with salt and pepper and mix well.
In the skillet, spread 1/4 cup pizza sauce. Pour in the cream cheese mixture, spread on the bottom and add a little sauce on top.
Add 1/3 of the pepperoni, half the mozzarella and half the Parmesan. Pour a little pizza sauce on top.
Add half of the remaining pepperoni, the rest of the sauce, followed by the rest of the mozzarella, Parmesan and pepperoni.
Place in the oven and cook for 30 minutes, until the mixture is boiling. Remove from oven and let stand 5 minutes before eating. Serve with toast, pitas or Tostitos!