Instructions:
- Peel, core, and slice the apples. Place them in a large bowl and toss with lemon juice.
- In a separate bowl, combine the granulated sugar, brown sugar, cinnamon, and nutmeg. Pour this mixture over the apples and toss to coat.
- Transfer the apple mixture to the slow cooker and spread it out evenly.
- In another bowl, combine the oats, flour, and salt. Cut in the cold butter until the mixture resembles coarse crumbs.
- Sprinkle the oat mixture over the apples in the slow cooker.
- Cover and cook on low for 4 hours or on high for 2 hours, or until the apples are tender and the topping is golden brown.
- Serve warm and enjoy!