2 cups uncooked elbow macaroni 3/4 cup chopped onion
1/4 cup chopped celery
1/4 cup chopped green pepper 2 teaspoons olive oil
1/2 cup meatless spaghetti sauce 1/2 teaspoon dried basil
1/2 teaspoon dried oregano
2 tablespoons all-purpose flour 1/2 teaspoon salt
1/4 teaspoon ground nutmeg 1/8 teaspoon cayenne pepper 2 cups fat-free milk
1 1/4 cups shredded reduced-fat Cheddar cheese
1/2 cup shredded part-skim mozzarella cheese
2 tablespoons grated Parmesan cheese
2 plum tomatoes, seeded and diced
