Preheat oven to 350°F (175°C).

Grease and flour a 13x9 inch baking pan.

In a large bowl, combine spice cake mix, apple pie filling, and beaten eggs.

Optionally, add minced pecans.

Spread the batter evenly into the prepared pan.

Bake for 30 to 40 minutes, or until a toothpick inserted into the center comes out clean.

While the cake is baking, prepare the glaze by combining powdered sugar, cinnamon, and water in a small bowl.

Mix until smooth, adding a few more drops of water if needed to achieve a drizzling consistency.

Once the cake is out of the oven, drizzle the glaze over the hot cake.

Serve warm or cold.

For added richness, frost with cream cheese or caramel-pecan frosting.