Preheat the oven to 350 degrees Fahrenheit.
Line a sheet pan with non-stick aluminum foil.
Shred the chicken and place in a medium bowl. You can use two forks or your fingers.
Pour the BBQ sauce over the chicken and stir to combine. Set aside.
Drain the black beans into a colander and rinse under cold water until the water runs clean. Shake off the excess water and place the prepared beans in a medium bowl.
Drain the corn into the colander and add to the black beans.
Thinly slice one half of a medium red onion. Cut the slice in half if they are particularly long.
Add the tortilla chips to the prepared sheet pan in a single layer. The chips should be spread out evenly over the pan.
Evenly sprinkle the drained black beans and corn over the torilla chips.
Sprinkle the sliced red onion over the beans and corn.
Add the chicken in BBQ sauce to the top of the veggies.
Sprinkle the cheese over the top of the chicken and veggies.
Bake for 15-18 minutes until the filling is heated through and the cheese is melted.
Serve warm with your favorite toppings.