At my house, tonight was make your own casserole from off the top of your head night. I browned 1 lb. ground beef and 1 chopped onion together. Added a jar of medium picante salsa, 1 teaspoon ground chipotle chile powder, 1 - 4 oz. can diced green chilies, and 1 cup water. That concoction simmered for about 10 minutes. To put the casserole together I first layered 4 corn tortillas in a 9x9 inch casserole, 1/3 meat mixture, sliced olives, and shredded cheddar cheese. Repeat layers 2 times. Then I put it in the oven for 30 minutes at 350 degrees F. It turned out great. It would have been even better if I had some avocado to slice across each serving.