Make a slit in the tortilla from the center straight down to one edge.
Picture the tortilla as four quadrants. Spread the mayonnaise and Dijon on the bottom-left quadrant.
Layer the turkey slices on the next quadrant.
Add the thinly sliced apple and a drizzle of hot honey to the next quadrant.
Add the shredded cheddar to the last quadrant.
Starting at the slit, fold the mayo-Dijon quadrant up over the turkey, then keep folding around so you end up with a neat stacked triangle.
Heat a greased pan over medium heat. Cook the folded quesadilla for 2 to 3 minutes per side, until golden and crispy and the cheese has melted.
Slice in half and enjoy.