1. Preheat your oven to 400°F (200°C). Line a baking sheet with parchment paper and lightly spray with non-stick cooking spray.
2. Arrange small mounds of shredded mozzarella cheese on the prepared baking sheet, leaving enough space between each for spreading.
3. Top each cheese mound with a slice or two of pepperoni, pressing down gently. Sprinkle with oregano and red pepper flakes if using.
4. Bake in the preheated oven for 5-7 minutes, or until the cheese is bubbly and the edges are golden brown. Keep a close eye to prevent burning.
5. Remove from oven and let cool on the baking sheet for a few minutes to allow them to crisp up before serving.

One tip I’ve learned from experience: ensure your cheese mounds aren’t too thick, as this helps them crisp up beautifully. It’s a trick I picked up from watching my mom make her famous quesadillas, where achieving the perfect cheese melt was an art form.