Add all of the ingredients to a 10" pan. Over medium-high heat, bring to a simmer and cook for 10 minutes.
Add the chicken breasts. Cover and turn off the heat. Let rest for 5 minutes and then flip the chicken, re-cover and let rest for another 5 minutes. If not cooked all the way through, turn the heat on low and cook for another 1-2 minutes.
Remove the chicken from the poaching liquid, slice and serve. Save the poaching liquid if you plan on storing leftovers.