Preheat oven to 350 degrees F (175 degrees C). Lightly grease a 9x13 inch baking dish.
In a large bowl, combine ground beef, ground pork, chopped onion, bread crumbs, egg, and milk. Season with parsley, Worcestershire sauce, 2 teaspoons salt, and 1 teaspoon pepper. Mix well with your hands. Shape into walnut-size balls, and place on baking dish.
Bake for 30 minutes in preheated oven. Turn frequently so they brown evenly on all sides.
Serve with noodles and sauce.
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