How to Make It
Combine first 8 ingredients in an 8-cup heatproof glass bowl. Set bowl in a 6-quart slow cooker; add cold water to slow cooker, filling until water comes three-fourths of the way up outside of bowl. Cover slow cooker; cook on LOW 8 hours or until oats are thick and creamy.
Melt butter in a medium skillet over medium-high heat. Add apples; cook 3 minutes or until browned, stirring occasionally.
Stir oats; spoon into bowls. Top with apples.