Combine first 4 ingredients; stir briskly with a fork until blended.
Melt butter in an 8-inch nonstick skillet over medium heat, tilting pan to coat bottom; pour in egg mixture.
Cook, without stirring, until mixture begins to set on bottom. Draw a spatula across bottom of pan to form large curds. Continue cooking until eggs are set but still moist (do not stir constantly).
Combine eggs, water, salt, and pepper; stir briskly with a fork until blended.
Place butter in a shallow 1-quart casserole. Microwave at HIGH 20 seconds or until melted; rotate casserole to coat bottom of dish.
Pour in egg mixture. Microwave at HIGH 1 minute. Break up set portions of egg with a fork, and push toward center of dish. Microwave at HIGH 1 to 2 minutes or until eggs are almost set (eggs will be soft and moist), stirring gently after 1 minute. Cover and let stand 2 minutes or until set.
