Prep the chicken by cutting each breast in half lengthwise, then cut each piece into 3 chunks. Set aside.
To your slow cooker, add all ingredients except the chicken and corn starch. Whisk to combine and there is no lumps.
Add the chicken, stir everything together, cover, and place on High setting for 3 hours.
At 3 hours, leave cooker on High, uncover and remove chicken with a slotted spoon.
Sprinkle the corn starch into the pot, whisk to mix in well. Leave the cooker on High and return chicken to the pot and mix in. Leave uncovered and simmer for 20-30 minutes, stir often to slightly thicken sauce.
Spoon over hot cooked rice or mashed potatoes, spoon sauce over the chicken and rice as desired, enjoy.