Preheat oven to 350 degrees
Combine softened butter with minced garlic and 2 tablespoon parsley
Cut bread 3/4 of the way through lengthwise and width wise forming a grid pattern.
Place loaf on foil sheet, spread the garlic butter in between all the slices
Stuff half of the Mozzarella cheese in between the bread slices, followed by the pepperoni.
Wrap in foil, bake for 15-20 minutes.
Remove from oven, increase heat to 400 degrees. Open foil and add the remaining cheeses and Italian seasoning. return to the oven, bake for 10 minutes.