Heat a large 12-inch skillet over medium heat. Add the olive oil, onion, bell pepper, and salt, stirring to combine. Cook until the onion is translucent, about 5-7 minutes, stirring occasionally.
Turn the heat to medium low, then add the chicken, black beans, enchilada sauce, tortilla pieces, ½ cup cheese, and ¼ cup chicken stock, stirring until well combined.
Cook on low for 3-5 minutes, or until the sauce has thickened and the tortillas have softened. If the pan starts to dry out too quickly, add an additional ¼ cup chicken broth.
Turn off the heat, then sprinkle with the remaining ½ cup of cheese. Allow to sit for about 5 minutes for the cheese to melt.
Serve with toppings of your choice.
Notes
For gluten-free, be sure to use gf enchilada sauce and gf tortillas.