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; saute 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. Yield: 4 servings. Per serving: 278 Calories; 16g Fat (55% calories from fat); 19g Protein; 10g Carbohydrate; 7mg Cholesterol; 527mg Sodium Recipe by: Cooking Light, Jan/Feb 1995, page 122 Posted to MC-Recipe Digest V1 #430 by igor@digex.net on Jan 28, 1997.