Cook the spaghetti according to package directions. Rinse with cold water and drain. In a large bowl, toss the spaghetti with egg substitute and Parmesan cheese. Spread evenly into a 15 in. x 10 in. x 1 in. baking pan coated with cooking spray; set aside.

In a large nonstick skillet, cook the beef, onion and peppers over medium heat until meat is no longer pink; drain. Add garlic; cook 1 minute longer. Stir in the spaghetti sauce and seasoning; heat through.

Spoon over spaghetti. Top with mushrooms and cheese. Bake, uncovered, at 350 for 25-30 minutes or until lightly browned. Let stand for 5 minutes before serving.