Spread a thin layer of mayonnaise over each tortilla. Top 1 tortilla with the sliced apples, cheese, and remaining tortilla.
Grill it:
Lightly grease a medium, non-stick skillet with butter or cooking spray and heat over medium heat. Add the quesadilla and grill for 3 minutes or until the cheese is melted. Flip and grill for another minute or until the bottom is golden brown. Remove the quesadilla from heat, slice, and serve.
Pack for school:
Wait 5 minutes until the quesadilla has cooled down to room temperature before packing it.
To enjoy at room temperature, refrigerate the lunch until you’re ready to pack it inside an insulated lunch bag and include an ice pack if necessary.
To eat warm, heat the quesadillas in the microwave for 1 minute, stopping the microwave halfway through to flip them over. Immediately transfer them inside a thermos container and close the lid.
Finish packing this lunch by adding fruit, veggies, and any other sides inside a bento box. Pack everything inside a lunch bag.