1. Preheat oven to 325°F. Coat 2 baking sheets with cooking spray.
2. Using a very sharp knife, or the slicing blade of a food processor, slice pears and apples into 1/8-inch slices.
3. Mix together cinnamon and Splenda in a small bowl. Place fruit slices in a single layer on baking sheets and sprinkle with cinnamon mixture. Bake, rotating baking sheets halfway through baking, until crisp and lightly browned, about 30 to 45 minutes.
Yields 1 sliced pear and apple per serving.
