Preheat oven to 350F.

In a large skillet, brown ground beef. Drain off any grease.

Add the undrained tomatoes with green chilies and taco seasoning, stir mixture until seasoning has dissolved.

Let mixture simmer until all liquid is gone, about 6 minutes. Then remove from heat and set aside.

Meanwhile, drain and rinse the black beans and corn. Set aside. Open refried beans and set aside.

Spray a 9x13-inch casserole dish with cooking spray.

Begin your casserole with a base layer of corn tortillas (4-6 depending on the size).

Then, layer the rest of the ingredients in this order: refried beans, taco meat, corn, black beans, sour cream, then cheese.

Repeat, until your fillings are gone.

Bake 30 minutes, let cool 5 minutes before serving.