Ingredients

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