Slow Cooker Cinnamon Apple Steel Cut Oats

cooking spray

8 cups water

23 ounces unsweetened applesauce

1 ½ cups steel cut oats

2 Granny Smith apples - peeled, cored, and diced

¼ cup ground cinnamon, or to taste

⅓ cup granular no-calorie sucralose sweetener (such as Splenda®)

Lightly spray a 5-quart or larger slow cooker crock with cooking spray.

Combine water, applesauce, oats, diced apple, cinnamon, and sweetener in prepared slow cooker.

Cook on Low for 6 hours.