Quesadilla Casserole

Excuse the bad picture, it was getting too dark outside for it to turn out well. Top reasons to make this meal...it is easy, it is cheap, it is meatless AND it is tasty. I have been eating it the past couple days for lunch and LOVE it. Thanks Rachael Ray :-).

Ingredients:
* 3 tablespoons vegetable oil
* 3/4 cup chopped onion
* One 29-ounce can black beans, drained, 1/2 cup liquid reserved
* 1 1/2 cups frozen corn kernels, thawed
* 1/2 cup chopped flat-leaf parsley (I used cilantro)
* Five 10-inch flour tortillas (I used 8 corn tortillas)
* 8 ounces monterey jack cheese, shredded
* 1 cup store-bought green enchilada sauce

Directions:
1. Preheat the oven to 400°. In a skillet, heat the oil over medium heat. Add the onion and cook for 5 minutes. Add 1 1/2 cups black beans and mash into a chunky paste. Stir in the reserved liquid.
2. Grease a heavy, ovenproof skillet. In a bowl, combine the corn, parsley and remaining black beans. Place a tortilla in the skillet and spread with 1/3 cup mashed black bean mixture. Top with 2/3 cup corn-bean mixture and 1/2 cup cheese. Press to compress the layers. Repeat with the remaining tortillas, mashed black beans, corn-bean mixture and cheese. Bake until the cheese is melted and the casserole is heated through, about 30 minutes. Transfer to the broiler and cook for 1 minute. Serve with the enchilada sauce.
**I put a little enchilada sauce on the bottom of the dish instead of greasing it.