Finely chop the herbs and vegetables: parsley, oregano, mint, garlic and onion.
In a large mixing bowl, combine the ground meat, breadcrumbs, olive oil, egg, ground cumin, chopped veggies, and salt and pepper. Mix well until all the ingredients are evenly combined.
Preheat the air fryer to 400°F (204°C).
While preheating, roll the Greek meatballs/keftedes into 1½-inch round balls or to your desired size. Make sure not to apply too much pressure for a softer texture.
Carefully place the uncooked Greek meatballs into the preheated air fryer, with even spacing between them. Cook for 10-12 minutes, flipping the meatballs when they reach 150°F. Continue cooking until the internal temperature reaches 160°F (71°C).
Serve and enjoy your air fryer Greek meatballs! They're best enjoyed with a side of tzatziki sauce and fresh vegetables. If you have pita bread, you can also use those ingredients to make a homemade gyro.