Preheat oven to 400 degrees. Line a rimmed baking sheet with parchment paper. Set aside.
Slice your favorite apple into 1/2-inch thick rounds. You will get about 4 slices from a medium-sized apple. Use a small heart-shaped cookie cutter to cut out the center star (core) of the apple. Dip both sides of apple slices into cinnamon-sugar mixture. Place on parchment paper-lined baking sheet. Bake in preheated 400-degree oven for about 10 minutes, until bubbly and a little tender. Eat warm with ice cream or place an apple slice on a bowl of hot oatmeal for breakfast. Yum!