Cook Pasta According To Package Directions. Meanwhile, In A Large Bowl, Beat The Egg, Salt, Garlic And Pepper. Add Beef And Mix Well. Sprinkle With Parmesan Cheese And Bread Crumbs; Mix Gently. Crumble Beef Mixture Into A Large Skillet. Cook Over Medium-High Heat Until Meat Is No Longer Pink; Drain. Stir In The Spaghetti Sauce. Reduce Heat; Cover And Simmer For 2-4 Minutes Or Until Heated Through. Drain Pasta; Place In A Serving Bowl. Add Beef Mixture; Sprinkle With 1/2 Cup Mozzarella Cheese. Toss Until Pasta Is Well Coated And Cheese Is Melted. Sprinkle With Remaining Mozzarella.