How to Make It
Place potato in a saucepan; add water to cover, and bring to a boil. Cover, reduce heat, and simmer 15 minutes or until tender; drain.
Melt margarine in a 10-inch nonstick skillet over medium-high heat. Add potato, onions, and next 5 ingredients; sauté 2 minutes. Spread mixture evenly in bottom of skillet; pour egg substitute over potato mixture. Reduce heat to medium-low, and cook, uncovered, 8 minutes or until almost set.
Wrap handle of skillet with aluminum foil; broil 5 1/2 inches from heat 3 minutes. Sprinkle with cheese; broil an additional 30 seconds or until cheese melts.