Quesadilla Casserole

Directions

1. 1
   Preheat oven to 400 degrees F and grease a 10 inch cast iron skillet.
2. 2
   In a skillet, heat oil over medium heat; add onions and cook until softened, about 5 minutes.
3. 3
   Add 1 1/2 cups black beans and mash into a chunky paste; stir in reserved liquid.
4. 4
   In a bowl, combine corn, parsley, and remaining black beans.
5. 5
   Place a tortilla in the prepared cast iron skillet; layer with 1/3 cup mashed black beans, 2/3 cup corn and bean mixture, then 1/2 cup cheese.
6. 6
   Repeat layers with remaining tortillas, ending with cheese.
7. 7
   Bake until cheese is melted and casserole is heated through, about 30 minutes.
8. 8
   Run under broiler for a minute if desired; serve with enchilada sauce.