PREPARATION:

1. Rinse spinach; drain, leaving water clinging to leaves. Place in large microwavable bowl; cover with plastic wrap. Microwave on HIGH about 3 minutes or until spinach wilts. Drain spinach; set aside.
2. Spray 8-inch nonstick skillet with cooking spray; heat over medium heat. Pour 3/4 cup egg substitute into skillet; cook about 2 minutes or until omelet is set, lifting edge of egg to allow uncooked portion to flow underneath.
3. Spoon 1/4 of spinach and 1/4 of tomatoes over half of omelet; sprinkle with 2 tablespoons cheese and pepper, if desired. Fold opposite half of omelet over filling. Transfer omelet to plate. Sprinkle with 2 tablespoons cheese. Repeat with remaining egg substitute, spinach, tomatoes and cheese to make 3 more omelets.