Preheat oven to 350°F.
Cook pasta according to package directions, omitting the salt and fat. Drain; set aside.
Melt 1 T margarine in a medium heavy saucepan over medium-high heat. Add onion and garlic; sauté 5 minutes or until tender. Add flour; cook 30 seconds, stirring constantly. Gradually add milk; cook 4 minutes or until bubbly. Remove from heat. Stir in ¼ C cheese, Italian seasoning, and pepper; remove from heat.
Combine pasta, cheese sauce, 1 C cheese, tomatoes, and spinach in a large bowl; stir well. Spoon mixture into a 13x9 inch baking dish coated with cooking spray.
Combine breadcrumbs, 2 T cheese, and remaining 1 T margarine; sprinkle over pasta mixture. Bake at 350°F for 30 minutes or until thoroughly heated. Garnish with parsley, if desired. Serves 6 (serving size: 1½ C)
NOTES: Instead of bottled minced garlic I used 5 or 6 fresh cloves, minced. For Italian seasoning I mixed some oregano, thyme, dried cilantro, black pepper, rosemary and a little salt. This dish freezes well.
Nutritional Info (original recipe):
CALORIES 372 (26% from fat); FAT 10.6g (sat 5.1g, mono 3.3g, poly 1.4g);
PROTEIN 21g; CARB 48.4g; FIBER 3.6g; CHOL 20mg; IRON 3.8mg;
SODIUM 884mg; CALC 525mg
Source: Cooking Light Magazine January/February 1997