I am not familiar with seeing a recipe like that so far. Maybe your son can dissect the dish by eating it....slowly.
Sounds like sauteeding or pan-frying chicken breast could be part of the recipe. I've made chili from scratch, which included soaking kidney beans overnight. If I made chili chicken, I would be using Malaysian chili paste (sambal olek) to fry up with the onions and garlic, before adding other stuff. I take after my mother, who invented after examining dish.
Ended up with some wierd dishes. Oh well.
By the way, my imagined white chicken chili, sounds delicious to me. Truly. It wouldn't be that unusual..sounds like replacing the sausage or ground beef. Less fattier too. Recipes online by typing that whole phrase name in Google, look interesting. I would tend to marinate the chicken breast in advance to give it more flavour.