In same pan, stir in salsa, tomato sauce & taco seasoning. Simmer, stirring often for 5 minute.
In seperate bowl, combine eggs, cottage cheese & oregano.
Line bottom of greased 13 X 9 pan with half of tortillas, overlapping edges. Top with half of meat mixture. Spoon cottage chees mixture over meat. Arrange remaining tortillas over cottage cheese; spread rest of meat mixture over top . Place shredded cheese over all.
Bake 30 - 35 minutes or until bubbly. Let stand 10 minute before cutting.