shredded mozzarella cheese
1brown beef and onion. drain. add taco mix and tomato sauce. add 1/2 c. water.
2butter both sides of tortillas. line 9x13 pan with 1/2 of the tortillas, 1/2 meat mix and 1/2 cheese.
3repeat layer ending with cheese. Bake at 350F for 25 minutes.