Creating the Butternut Squash Apple Bake is straightforward if you follow these simple steps:

1. Preheat Oven: Preheat your oven to 375°F (190°C).
2. Prepare Baking Dish: Lightly grease a 9×13-inch baking dish with cooking spray or a little butter.
3. Mix Squash and Apples: In a large bowl, combine the diced butternut squash and sliced apples.
4. Add Spices and Sweetener: Sprinkle the brown sugar, cinnamon, nutmeg, and salt over the squash and apples. Toss gently to coat evenly.
5. Add Butter and Vanilla: Drizzle the melted butter and vanilla extract over the mixture. Stir until well combined.
6. Layer in Baking Dish: Transfer the mixture to the prepared baking dish, spreading it out evenly.
7. Prepare Oat Topping: In a separate bowl, mix rolled oats and chopped nuts (if using). Sprinkle this mixture evenly over the fruit layer.
8. Bake: Bake in the preheated oven for 40-45 minutes, or until the squash is tender and the topping is golden brown.
9. Cool: Remove from the oven and allow to cool slightly for about 5-10 minutes before serving.

With these simple steps, you will create a deliciously baked dish that everyone will love!