Preheat the Air Fryer: Preheat the air fryer to 375°F (190°C). This step ensures that the meatballs cook evenly right from the start.
Prepare the Meatball Mixture: In a large bowl, combine the ground meat, breadcrumbs, egg, Parmesan cheese, garlic, oregano, salt, and pepper. If using, add the chopped parsley. Mix everything together until well combined. Be careful not to overmix, as this can make the meatballs tough.
Form the Meatballs: Take about 1 to 1.5 tablespoons of the mixture and roll it into a ball. Repeat this process until all the mixture is used. You should have about 20-24 meatballs depending on the size.
Arrange in the Air Fryer: Lightly spray the air fryer basket with olive oil. Place the meatballs in the basket in a single layer, making sure there’s space between each one. This allows the hot air to circulate around them, ensuring an even cook.
Air Fry the Meatballs: Air fry the meatballs at 375°F (190°C) for 12-15 minutes. Shake the basket halfway through cooking to ensure even browning. The meatballs are done when they are golden brown on the outside and the internal temperature reaches 165°F (74°C).
Serve and Enjoy: Once cooked, remove the meatballs from the air fryer and serve with your favorite dipping sauce, over pasta, or in a sandwich. Garnish with extra parsley or Parmesan cheese if desired.