Preheat oven to 400°.
Heat a 10-inch ovenproof skillet over medium-high heat. Coat pan with cooking spray; add tortilla pieces, and sauté 2 minutes or until lightly browned. Stir in black beans, chiles, and garlic. Cook 1 minute or until thoroughly heated.
Combine egg whites, egg, salt, and black pepper, stirring with a whisk; pour over tortilla mixture. Sprinkle with cheese. Bake at 400° for 13 minutes or just until set. Sprinkle with cilantro. Cut into 6 wedges. Serve with salsa and sour cream.