Step 1

Combine sugar and cinnamon.

Step 2

Melt butter in a nonstick skillet over medium-low heat, tilting pan to coat the bottom.

Step 3

Place one tortilla into pan. Layer with the 1/4 cup gouda, apple slices, walnuts and cinnamon-sugar mixture.

Step 4

Top with remaining gouda and tortilla. Cook for 2-3 minutes on each side or until cheese is melted.

Step 5

Transfer quesadilla to a cutting board. Cut into wedges.