Step 2: Poach your chicken!
Make sure to cut any excess fat off the breasts before you put them in the pot!
Then, place them in a pan and cover them with 2-3 inches of water and bring to a boil. Once it's boiling, reduce heat to a simmer, cover and let it do its thing for 15 minutes for thawed chicken, 20 for frozen.
When it's done, just take it off the heat and lie the breasts on a plate to rest.
I had a little bit of homemade taco seasoning on hand, so I added a couple of pinches of that. You can add bay leaf, cumin, chili powder - anything that will work with the rest of the flavors in the recipe.
While this is going, mince and dice the veggies.