Spaghetti Pie

Ingredients

• 6 ounces uncooked spaghetti
• 1 pound lean ground beef (90% lean)
• 1/2 cup finely chopped onion
• 1/4 cup chopped green pepper
• 1 cup undrained canned diced tomatoes
• 1 can (6 ounces) tomato paste
• 1 teaspoon dried oregano
• 3/4 teaspoon salt
• 1/2 teaspoon garlic powder
• 1/4 teaspoon pepper
• 1/4 teaspoon sugar
• 2 large egg whites, lightly beaten
• 1 tablespoon butter, melted
• 1/4 cup grated Parmesan cheese
• 1 cup fat-free cottage cheese
• 1/2 cup shredded part-skim mozzarella cheese