Preheat oven to 350°F. Spray a 9×5-inch loaf pan with non-stick cooking spray. Set aside.
In a small bowl, combine melted butter, minced garlic, chopped parsley, and kosher salt. Stir well and set aside.
In a separate bowl, combine the mozzarella and sharp cheddar cheese. Reserve ¼ cup of the cheese mixture for the topping. Set aside.
Remove the biscuits from the can, separating each biscuit. Then, peel each biscuit into two layers, creating a total of 16 layers.
Dip one layer of biscuit dough into the garlic butter, ensuring it's completely coated. Sprinkle about 1 tablespoon of the shredded cheese mixture on top. Top with 1 heaping tablespoon of mini pepperonis. Repeat with the remaining layers, stacking them on top of one another as you go. (Create two stacks of 8 layers each.)
Carefully place the stacks horizontally in the prepared loaf pan, from one end to the other, ensuring a tight fit.
Cover with aluminum foil and bake for 35 minutes. Then, remove the foil and top with reserved cheese and pepperoni. Bake for an additional 25 minutes, or until the bread is golden brown and cooked through.
Once done, remove the bread from the oven and let it cool for a few minutes.
Garnish with extra chopped parsley if desired. Serve warm with pizza sauce for dipping.