In a large mixing bowl, combine the ground beef, breadcrumbs, grated Parmesan, parsley, minced garlic, egg, oregano, basil, salt, black pepper, and red pepper flakes. Mix everything until well incorporated.
Wet your hands slightly and shape the mixture into meatballs, about 1 to 1.5 inches in diameter.
Preheat your air fryer to 200 for about 5 minutes.
Place the formed meatballs in the air fryer basket, ensuring they are spaced apart.
Air fry at 200 for 10-12 minutes, turning halfway through the cooking time until golden brown and cooked through.
Remove the meatballs from the air fryer and let them cool for a few minutes. Serve with warm marinara sauce.
Notes
Adjust spices to taste. Optional red pepper flakes for heat.