Whisk together eggs, milk, salt and pepper in a large bowl.
In a large skillet coated with cooking spray, cook and stir egg mixture over medium heat until it turns into scrambled eggs and no liquid egg remains. Place scrambled eggs in a bowl and set aside.
In the same skillet that was used to cook the eggs, cook and crumble sausage over medium heat until no longer pink, (it will take about 5-6 minutes); drain grease.
In a mixing bowl, stir together sour cream, canned soup and green chiles. Spread half the sour cream mixture in an ungreased 9x13 inch. casserole dish. Layer with half the tortilla pieces, half the salsa, the scrambled eggs, the sausage mixture, and the remaining tortillas and sour cream mixture.
Top with remaining salsa; sprinkle with cheese. Bake (uncovered) for about 30-35 minutes or until the middle is completely heated through.
If desired, serve with salsa or pico de Gallo, fresh chopped cilantro, sliced green onions, or hot sauce.
Notes
Optional toppings are not included in nutritional information.