Preheat your oven to 375°F (190°C) and lightly grease a 9x13 baking dish with butter or coconut oil.

Peel the butternut squash and cut it into 1-inch cubes. Core the apples and slice them into thin wedges or cubes.

In a large mixing bowl, combine the cubed butternut squash and sliced apples. Pour in melted butter, cinnamon, nutmeg, salt, and maple syrup. Toss the ingredients until well coated.

Transfer the mixture into the prepared baking dish and spread evenly across the bottom.

Place the dish in the oven and bake uncovered for 40-45 minutes, stirring halfway through.

Let cool for a few minutes, then serve warm, optionally garnished with fresh thyme or chopped nuts.