Lightly grease a 5-inch quiche pan with cooking spray.
In a small-sized bowl, add heavy cream and egg and whisk until well combined.
In the bottom of prepared 5-inch quiche pan, place the broccoli florets and top with egg mixture.
Sprinkle the top with cheese evenly.
Slide the basket in Air Fryer and adjust the temperature to 325 °F to preheat for 5 minutes.
After preheating, arrange the quiche pan 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 quiche pan from Air Fryer and set aside for about 5 minutes before serving.