Step 2) Pour 2 cups oil into deep heavy skillet to a depth of 1/2-inch; heat over medium heat.
Step 3) Fry tortilla strips, a few at a time, turning until light brown and crisp. Drain on paper towels.
Step 4) Heat 2 teaspoons oil over medium in a 10-inch skillet. Add onion; cook, stirring, until tender.
Step 5) Combine eggs and egg whites in a small bowl, mix lightly (do not beat). Pour eggs into skillet; cook over medium heat, stirring occasionally until eggs are slightly mounded and moist.
Step 6) Add salsa and fried tortilla strips; stir JUST to coat. Top with cheese. Reduce heat; cover and simmer until cheese melts, about 5 minutes.
Step 7) Serve immediately from skillet. Garnish with sour cream, cilantro and onions.