Remove the meat from the rotisserie chicken. Separate it into pieces or coarsely chop it into small pieces.
Cook the fajitas:
In a large pan, heat up the oil. Add the onions and peppers and sauté for about 3 minutes, until they begin to soften. Add the taco seasoning, and stir to combine.
To the peppers and onions, add the chicken and combine it to heat it through. Add a tablespoon of water to create some steam in the pan, distribute the seasonings, and stir to combine.
Assemble:
Build a base for your chicken fajita bowls with some rice and top it with the chicken and peppers mixture, warmed black beans, and load up the toppings!