Preheat oven to 375 degrees F. Spray the inside of a 1 1/2-2 quart baking dish with cooking spray; set aside.
In a large skillet set over medium heat, cook beef, onion and green pepper until no longer pink; drain any excess grease.
Stir in 1 cup cheddar cheese, taco seasoning and broth. Cook and stir until cheese is melted and mixture has thickened, about 3 minutes.
Remove the skillet from the heat and stir in the black beans, then transfer half of the mixture to the greased baking dish. Spread the tortilla chips in an even layer, then top with the remaining beef mixture.
Sprinkle the remaining cheese on top and bake, uncovered for 15 to 20 minutes.
Garnish with your favorite toppings. Serve with sour cream and hot sauce.
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Notes
The nutritional information does not include any of the additional toppings. Storing: Keep leftovers in an airtight container in the fridge, and enjoy within 3-4 days. Leftovers can be reheated in the microwave or oven, but the tortillas will lose their crunch.Freezing: You can freeze the cooked taco meat mixture, then when you're ready, let the meat thaw in the fridge before assembling, and baking the casserole as instructed.