01 - Preheat oven to 375°F (190°C). Lightly grease a small baking dish with nonstick spray or a small amount of oil.
02 - Layer the apple slices evenly in the prepared dish. Drizzle the maple syrup and water over the apples, then sprinkle with ground cinnamon.
03 - Cover the baking dish with foil and bake for 20 minutes.
04 - Remove the foil and continue baking for 5 to 10 minutes, or until apple slices are tender and starting to caramelize at the edges.