Quesadilla Casserole

I made this casserole to go with the red rice and beans, it is a very quick and easy recipe to make, although I was a little concerned about the tortillas getting soggy it was a really great dinner that we both enjoyed.

1 lb ground beef
1 onion, chopped
2 tsp chili powder
1 tsp ground cumin
1 garlic clove, minced
1/2 tsp oregano
1/2 tsp crushed red pepper
16 oz tomato sauce
1 can black beans, drained and rinsed
1 can corn
1 can green chilies
6 flour tortillas
2 cups shredded Cheddar Cheese

Brown beef and onion in a large skillet on medium-high.  Add tomato sauce, beans, corn and green chilies.  Mix well.  Stir in all of the spices.  Bring to a boil, reduce heat low and simmer 5 minutes. 
Spread 1/2 cup of the beef mixture on bottom of 9 by 13 pan. Top with 3 of the tortillas, layer with 1/2 of the remaining beef mixture and 1/2 of the cheese.  Repeat with remaining tortillas, beef and cheese. 
Bake at 350 degrees for 15 minutes or until heated through.