Cook the ground beef & diced onion in a skillet until the onion is soft & the beef is cooked through. Season with salt & pepper. You can also season to taste with taco seasoning for added flavor if you like but it's not necessary. Drain off the grease. Mix in the taco sauce, black beans, corn, & corn tortillas. Stir in 1 cup of the shredded cheese. Remove from the heat & sprinkle on the remaining cup of cheese. Serve.
