Chop onions. To make a large dice, first cut off the ends and remove seeds, and then cut in two:
Cut into strips:
Cut the strips into squares (sorry for the blurry picture)
Add the peppers (I used a mixture of green and red for visual interest) to the pot, along with chicken stock or canned chicken broth. I added cumin, cilantro, salt, pepper, and ancho chili powder. If you're not trying to be careful of the heat level, you can add hot sauce as well.
Add the chicken in the last two minutes, so it doesn't dry out. I added half of this chicken meat - so the meat of one chicken.
Serve with salsa or hot sauce for anyone who wants to add more heat.