This is one of my favorite weeknight desserts. It can be super healthy, or slightly indulgent, as you prefer. I love how quick and easy it is, and it will be hot and ready after dinner with no need to remember to start dessert during dinner prep or juggle oven availability.
This can be done with any size slow cooker, and as few or many apples as desired. They make a great breakfast too. Here's my method:
Wash the apples well, and core them. Try to leave a little bit of bottom in the hole, but it doesn't matter a ton if you go all the way through.
Sprinkle on cinnamon, nutmeg, ginger, cloves, etc, as desired. Fill the core holes about 2/3 full with a couple of tablespoons of oats. I use old fashioned.
Add a teaspoon or so of brown sugar, honey, maple syrup, or any sweetener of your choice to the top of the oats. You can leave this out as well, if desired.
Dust with spices again, and top with a 1/4 tbl of butter. The butter isn't absolutely necessary either, so depending on what calorie count you're going for, it can be left out if desired.
I do all of this right in the slow cooker, so I don't have to worry about any clean up when oats or spices miss the mark.
Add a tablespoon or so of water to the bottom, and cook on low for 5-8 hours. The cooking time will vary depending on the size and kind of apple. Serve warm, and spoon the juice on the bottom of the slow cooker over the apples.