Preheat oven to 375 degrees.

Line a 9 x 13 baking dish with parchment paper or grease with cooking spray.

Mix cake mix and oats in a large bowl.

Add melted butter, stir until crumbly.

Press down half the crumbs onto the bottom of the pan.

Combine preserves and water, spread over crumbs. If preserves are already easy to spread, you don't need to add the water.

Spread remaining crumbs over preserves and press down firmly.

Bake for 18 to 23 minutes or until very lightly golden brown.

Eat warm or cool, cut into bars, and serve.