Cook onion in a large nonstick skillet coated with cooking spray over medium-high heat about 4 minutes or until tender. Add beans and cumin; cook about 4 minutes or until thoroughly heated. Set aside, and keep warm.
Combine egg whites and next 4 ingredients in a bowl; stir well with a whisk. Heat 1/4 teaspoon oil in a small nonstick skillet over medium heat. Pour 1/2 of egg mixture into pan. Cook 5 minutes; flip omelet. Spread 1/2 of bean mixture onto 1/2 of omelet. Sprinkle with 1/4 cup chips and 1/2 of cheese. Carefully loosen with a spatula; fold in half. Cook 2 minutes. Slide onto a plate. Spoon 1/2 of chile sauce and 1 tablespoon cilantro on omelet. Repeat procedure with remaining 1/4 teaspoon oil, and remaining ingredients. Serve immediately.
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