Cook pasta according to package directions. Meanwhile, in a Dutch oven, cook the beef, onion, salt and pepper over medium heat until meat is no longer pink; drain. Stir in the pizza sauce, garlic salt and Italian seasoning; remove from the heat and set aside. In a small bowl, combine the eggs, milk and Parmesan cheese. Drain pasta; toss with egg mixture. Transfer to a greased 3 qt. baking dish. Top with beef mixture, mozzarella cheese and pepperoni. Cover and bake at 350 degrees F for 20 minutes. Uncover; bake 20-25 minutes more or until golden brown.