1. Peel and finely dice the onion. Add the minced meat, diced onion, egg, breadcrumbs, and seasonings to a large bowl and mix to combine. Cover and let stand for about 10 minutes.

2. Preheat the Air Fryer to 390°F (200°C) if necessary (usually not required). Spray the bottom of the Air Fryer basket with a bit of olive oil and place 6-8 meatballs in the basket, depending on the size of your device. The meatballs should not be touching each other and have enough space all around. Bake the meatballs for about 12 minutes, turning them once in between. Depending on your Air Fryer, the cooking time may vary slightly. If you have a meat thermometer, you can check the core temperature. When it reaches 158°F-161°F, the meatballs should be cooked through and still nice and juicy ;)