Quesadilla Casserole

1 lb. ground beef
1/2 C. chopped onion
2 tsp. chili powder
1 tsp. ground cumin
1 tsp. minced garlic
1/2 tsp. oregano
16 oz. tomato sauce
1 can black beans, drained and rinsed
1 can whole kernel corn, undrained
1 can (4.5 oz.) green chilies
6 flour toritllas
2 cups shredded cheddar cheese

1. Brown beef and onions in a large skillet.  Add tomato sauce, beans, corn and green chilies.  Mix well.  Stir in all of the spices.  Bring to a boil, reduce heat to low and simmer for 5 minutes.
2. Spread 2/3 cup of the beef mixture on the bottom of a 9x13 pan (sprayed with pam).  Top with 3 of the tortillas overlapping as needed.  Layer with 1/2 of the remaining beef mixture and 1/2 of the cheese.  Repeat with remaining tortillas, beef and cheese.
3. Bake uncovered at 350 for 15-20 minutes or until heated through.  Let stand 5 minutes before serving.

We like to put sour cream on top of ours.