Cook sausage in a large skillet over medium-high heat, stirring until it crumbles and is no longer pink. Drain and return to skillet. Add chopped onion and bell pepper to sausage; sauté over medium heat 5 minutes or until vegetables are tender. Stir in tomatoes and green chiles; reduce heat. Cover and simmer 10 minutes.
Layer half each of tortilla pieces, sausage mixture, and cheese in a lightly greased 13" x 9" baking dish. Repeat layers.
Whisk together eggs and next 3 ingredients; pour over layers in dish.
Bake, uncovered, at 350° for 25 to 30 minutes or until lightly browned and set in center. Sprinkle with cilantro before serving.