I made this on Tuesday using supermarket rotisserie chicken. I added the beans and chopped onions like someone said. I used a jalapeno cornbread mix instead of the muffin mix, adding about 1/4 cup canola oil. I also added a packet of Sazon GOYA and some smoked paprika to the chicken mix.
...it was excellent. More importantly it was even better the next day after sitting in the fridge overnight. Reheated, of course..
Next time I think I will let it cook in the oven for 10-15 minutes before adding the cheese, just to cook the onions a bit more.
Thanks for this one, it's going in the good recipe folder.