Preheat your air fryer to 380 degrees.
Using a large, sharp knife slice acorn squash in half through the middle. Scoop out seeds. Cut each half in half again. Slice these quarters into ½ inch slices. Place in a large bowl.
In a small bowl mix together melted butter, brown sugar and salt. Pour over squash slices and toss until well coated.
Add chopped sage and mix well. Place squash in the air fryer.
Air fry the squash slices for about 15 minutes, stopping halfway through to flip pieces for even cooking. Cooking times may vary depending on air fryer.
