Begin by heating a nonstick skillet over medium heat. Add a tablespoon of olive oil or butter, allowing it to melt and coat the bottom.

Lay a flour tortilla flat on a clean surface. On one half of the tortilla, spread a thin layer of pizza sauce, followed by a generous amount of mozzarella cheese and a handful of pepperoni slices.

Carefully fold the tortilla in half, covering the cheese and pepperoni. Gently press down with your hands to seal the edges.

Place the folded quesadilla in the hot skillet. Cook for about 2–3 minutes on one side, or until it turns a golden brown and the cheese starts to melt.

Once the first side is crispy, carefully flip the quesadilla using a spatula. Cook for another 2–3 minutes on this side until it's also golden brown.

Once cooked, remove the quesadilla from the skillet and let it cool for a minute. Then, slice it into wedges for easy serving.