Heat a 10-inch nonstick skillet coated with cooking spray over medium-high heat. Add potatoes, onion, and bacon; saute 8 minutes or until potatoes are golden brown. Remove from pan. Wipe pan clean with paper towels; recoat with cooking spray. Combine salt, hot sauce, pepper, eggs, and egg whites in a medium bowl, stirring with a whisk. Stir in potato mixture, cheese, and chopped green onions.
Heat pan over medium heat. Pour in egg mixture. Reduce heat to medium-low; cook 3 minutes or until bottom is lightly browned, lifting edges and tilting skillet as eggs cook to allow uncooked portion to flow underneath cooked portion.
Wrap handle of pan with foil. Broil 2 minutes or until top is lightly browned and set. Garnish with green onion strips, if desired.