Preheat oven to 400°F.
Line a baking sheet with parchment paper.
Arrange the pepperoni slices in a single layer on the parchment paper.
Sprinkle Mozzarella cheese over the pepperoni.
Bake for 8-10 minutes, or until the pepperoni is crispy and the cheese is melted and golden brown.
Remove from oven and let cool for a few minutes before serving.
Calories: 171kcal | Carbohydrates: 1g | Protein: 8g | Fat: 15g