Grease a baking dish with cooking spray. Set aside.
In the bottom of the prepared baking dish, place the spinach.
Spray each scallop with cooking spray evenly and then sprinkle with a little salt and black pepper.
Arrange scallops on top of the spinach in a single layer.
Slide the Air Fryer Basket inside and adjust the temperature to 350 °F to preheat for 5 minutes.
After preheating, arrange the baking dish into the Air Fryer Basket.
Slide the basket into Air Fryer and set the time for 10 minutes.
After cooking time is finished, remove the baking dish from Air Fryer and serve.