Heat oven to 350°F. Grease 9 1/2 or 10-inch deep-dish glass pie pan. Cook spaghetti to desired doneness as directed on package. Drain.
Meanwhile, in large nonstick skillet, brown sausage over medium-high heat, stirring occasionally. Drain.
Stir in bell pepper stir-fry, tomatoes, tomato sauce and olives. Bring to a boil. Reduce heat to medium; cook 5 to 8 minutes or until vegetables are tender and mixture is slightly thickened, stirring occasionally.
In medium bowl, beat eggs; stir in Parmesan cheese. Add cooked spaghetti and parsley; mix well. Spread evenly over bottom and up sides of greased pan. Spoon sausage mixture over spaghetti.
Bake at 350°F. for 25 to 30 minutes or until spaghetti mixture is set. Sprinkle with mozzarella cheese; bake an additional 5 minutes or until cheese is melted.