Step 1

Add all the pesto ingredients to a food processor and blend until creamy.

Step 2

Heat a large pan over medium heat and spray with cooking spray, if not non-stick.  Spread half a tortilla with 2-3 tablespoons pesto and then top with sliced tomato (optional) and a handful of shredded cheese.

Step 3

Cook quesadilla for 2-3 minutes on each side, until tortilla is browned and cheese is melted.  Repeat with each additional quesadilla.