Place oats and salt, if desired, in microwave-safe bowl (at least 4-cup capacity). Add egg white or whole egg to oats. Stir to combine (no specks of yolk should show if using whole egg). Stir in zucchini. Add milk; stir until all ingredients are well combined. For quick oats, microwave on HIGH, uncovered, 2 to 2-1/2 minutes or until egg is fully cooked and oats are desired consistency. For old fashioned oats, microwave on HIGH, uncovered, 2 minutes. Stir oats, microwave about 1 minute longer in 30 second intervals, stirring after each interval until egg and oats are cooked. Let stand 1 to 2 minutes before stirring in other ingredients if thicker consistency is desired.
Serving Tip: Top with Greek-style yogurt, fresh fruit, berries or nuts, as desired.