Add beef, pork, bread crumbs, parsley, oregano, parmesan, egg, salt, and pepper to a large mixing bowl. Use your hands to gently break up mixture and distribute ingredients. Shape mixture into small (1-inch) meatballs and transfer to a large baking tray drizzled with avocado oil or olive oil. Place oven rack on highest shelf and turn oven to broil. Broil meatballs for 4-5 minutes, or until browned. Note that the meatballs will not be fully cooked, they’ll continue to cook in the soup.