In a large bowl whisk the eggs. To the eggs add dried Italian seasoning, salt, black pepper, onion, garlic, panko and milk. Mix to combine.
To the bowl add the ground beef, sausage, Parmesan and chopped parsley. Mix until just combined and the ingredients are evenly distributed.
Using a meatball scoop or a tablespoon, form the meat mixture into 36 round meatballs.
Place the meatballs on a sheet pan and cover. Chill for at least 1 hour (or overnight) to allow the flavors to blend.
Air Fry: Preheat the airfryer to 375°F, about 3-4 minutes. Spray the basket with cooking spray then arrange the meatballs in the basket in a single layer without touching to allow air to circulate.
Cook in batches for 15 minutes, stopping to turn halfway through cooking. Cook until the meatballs are no longer pink or an instant read thermometer registers 165°F.
Garnish with the remaining parsley and serve immediately with picks as an appetizer, over pasta or on a hoagie roll covered in provolone cheese for a meatball sub.
Oven Instructions: Prepare the meatballs per the recipe. Arrange in a single layer on a broiler pan sprayed with nonstick cooking spray or a rimmed sheet pan lined with parchment paper or aluminum foil. Bake in a preheated 375°F oven for 20 minutes. Increase the temperature to 425°F and cook for an additional 10 minutes or just until golden brown.