Preheat the oven to 425°F. Prepare a sheet pan with a light coating of oil or lining of parchment paper. Set aside.
In a large skillet over medium heat, cook the onion and bell pepper in olive oil until softened, about 5-7 minutes.
Add the chicken and sprinkle in the chili powder, cumin, paprika, garlic powder, salt and pepper. Stir and cook until the chicken is cooked through, about 8–10 minutes. Stir in the beans and corn, heating through for 3–4 minutes. Drain any excess liquid.
Arrange the tortillas on the prepared sheet pan with 1-2 in the center and the others around the edges so they hang halfway over. Make sure the tortillas overlap to fully cover the bottom of the pan.
Sprinkle half the cheese on the tortillas, then spoon the chicken mixture evenly over the base. Top with the remaining cheese.
Fold overhanging tortillas over the filling to cover completely.
Place a second sheet pan on top and press gently. Bake for 20 minutes.
Remove the top sheet pan and bake for another 5-8 minutes, until golden brown.
Remove from oven and let the dish rest for 5 minutes. Slice and serve warm.