Preheat your oven to 375 degrees
In a small bowl, combine brown sugar, cinnamon and apple pie spice.
Arrange crescent roll triangles on baking sheet lined with parchment paper or a silpat.
Melt butter and brush butter on top of crescent roll dough. Evenly distribute brown sugar mixture onto each triangle.
Sprinkle Walnuts on each crescent dough triangle
Place an apple slice on the wide end of each triangle. Wrap crescent roll dough around each apple tucking the sides in while rolling.
Bake for 10-12 minutes, or until golden brown. Cool for 5 minutes before serving.