Taco Cornbread Casserole

Taco Cornbread Casserole
Leda aka tattoedmomma

1 package (8 1/2 oz) corn bread/muffin mix
1 egg
1/3 cup milk
3 cups cooked taco seasoned meat
1 can black beans ( I used refried beans because we don't like black beans)
1 cup (8 oz) sour cream, light
1 cup colby jack, cheddar or mexican cheese, shredded and divided
1/2 cup onion, chopped
1 medium tomato, chopped
1 cup shredded lettuce
1 can sliced olives

In a large bowl, combine the corn bread, egg and milk until blended.  Spread into an 8 x 8 pan sprayed with cooking spray.  Bake at 350 for 15 minutes.  Combine taco meat and beans, spread over corn bread.  Combine sour cream, 3/4 cup cheese and onion.  Spread over meat mixture.  Bake for 20 - 25 minutes longer or until heated through and cheese is melted.  Sprinkle with tomato, lettuce and remaining 1/4 cup of cheese.