In a shallow bowl, combine 5 tablespoons of granulated sugar with 1 teaspoon of ground cinnamon until well mixed.

Place a non-stick pan over medium heat and add 1/2 tablespoon of unsalted butter, allowing it to melt.

Spread 1/2 tablespoon of caramel sauce on one half of a flour tortilla, then add 2-3 tablespoons of apple pie filling on top.

Fold the tortilla over to create a half-moon shape and place it in the preheated pan to cook for about 3-4 minutes on each side.

Brush the cooked quesadilla with another 1/2 tablespoon of melted butter and dip it into the cinnamon sugar mixture for coating.

Repeat the process with the remaining tortillas, serving warm with extra caramel sauce.