1 1/2 lb. hamburger, lean
1/2 c. water
1/2 to 1 pkg. taco seasoning
1/2 c. chopped onion
1 c. shredded cheddar cheese
1/2 to 1 c. shredded mozzarella cheese
1 c. sour cream
1 can black olives, sliced
1 can crescent rolls
taco or corn chips

Brown hamburger and onion. Drain, if necessary. To make grease pie plate and press 1 package of crescent rolls. Put a layer of crushed taco or corn chips on crust. Layer alternately with meat mixture, cheddar cheese, mozzarella cheese, sour cream and olives, if desired. Top with small amount of crushed chips.

Bake at 350°F for 25 to 30 minutes.