Preheat your oven to 375°F.
In a bowl, combine the granola, raisins, nuts, and cinnamon. Mix well, and if you want a touch of sweetness, drizzle honey into the mixture.
Place your cored apples in an oven-proof baking dish, and proceed to fill each apple with your granola mixture.
Top each apple with a teaspoon of butter and transfer to the oven.
Bake for 30-40 minutes or until the apples are soft and sticky.
Once done, remove from the oven and allow them to cool briefly.
Serve them warm with a scoop of crème fraiche or ice cream, and enjoy!