Brush the pan with oil. Heat the pan over a medium-high flame (or to 350 degrees if you are using an electric skillet)
Place tortilla on the pan.
Sprinkle with ~ 3 tablespoons of cheese.
Spoon ~ 2 tablespoons of pizza sauce on the cheese.
Place 4 pepperoni slices on the pizza sauce.
Add any other pizza ingredients that you like.
Sprinkle with ~ 3 tablespoons of cheese.
Put tortilla on top. Cook until bottom tortilla is browned, 3 -5 minutes.
Flip and cook until the bottom tortilla is browned, approximately 3 - 5 minutes.
Repeat process for the other quesadillas.
Use a pizza cutter to cut the quesadilla into fourths. Serve while warm.