Ingredients: 
Nonstick cooking spray
1 box (8 ounces) manicotti
1 teaspoon olive oil
1 cup chopped onion
1 cup plum tomatoes (approximately 2 tomatoes), chopped
1 cup chopped green pepper
2 cloves garlic, minced
3 (4-ounce) boneless, skinless chicken breasts, cooked and diced
1 1/2 cups (6 ounces) shredded reduced-fat Mozzarella cheese 
1 cup part-skim Ricotta cheese
1 large egg, lightly beaten
3/4 cup freshly grated Parmesan cheese, divided use
1/2 cup fresh basil leaves, chopped
1/2 teaspoon salt
1/8 teaspoon black pepper
1 jar (26 ounces) low-sodium, fat free marinara sauce