Make the meatballs: in a large bowl, mix the ground beef, breadcrumbs, onion, egg, Italian seasoning, dry parsley, salt, and pepper until well combined. Form into golf-size balls.
Heat the oil in a large skillet and brown the meatballs carefully on all sides. Pour in the milk, beef broth, Worcestershire sauce, dijon mustard, and remaining salt and pepper. Bring to a boil, add the egg noodles, and stir until the noodles are cooked and the liquid has reduced to a sauce.
Take off the heat, and add the Parmesan cheese and parsley. Stir until the cheese has melted and serve hot.