Prepare the Squash: Peel the butternut squash (or other squash of your choice) and cut off both ends. Slice the squash in half lengthwise and scoop out the seeds. Cut the squash into 1-inch cubes or slices for even cooking.
Season the Squash: Place the cubed squash into a large mixing bowl. Drizzle with olive oil and toss to coat evenly. Sprinkle with garlic powder, cinnamon, nutmeg (if using), salt, and pepper. Mix until well coated, ensuring each piece is seasoned.
Preheat the Air Fryer: Preheat your air fryer to 375°F (190°C). Preheating ensures even cooking and a crispy exterior.
Cook the Squash: Transfer the seasoned squash into the air fryer basket in a single layer. Cook for 15-20 minutes, shaking the basket halfway through to ensure even crisping. The squash should be golden brown and tender when done.
Serve and Enjoy: Once cooked, remove the squash from the air fryer and sprinkle with fresh herbs like thyme or rosemary, if desired. Serve immediately as a side dish, or enjoy as a snack!