Coat a 9x13-inch pan with vegetable spray. Place bread in pan, buttered side down. Beat eggs and sour cream together and pour over bread. Crumble sausage over egg mixture and bread. Mix cheese and chilies and sprinkle over sausage. Refrigerate 8 hours or overnight.
In the morning: Bake at 350 degrees F for 1 hour. Cut into squares and serve.