Combine first 5 ingredients; stir well with a whisk. Stir in noodles and spinach.
Melt margarine in a 10-inch ovenproof skillet coated with cooking spray over medium heat.
Add garlic; saut 1 minute.
Spread egg mixture in skillet. Cover; reduce heat to low. Cook 6 minutes or until top is almost set. Uncover; sprinkle with cheese. Preheat broiler. Broil 5 minutes.