To make this recipe in your slow cooker, pour the sauce mixture over the chicken in your slow cooker. Cook on Low for 3-4 hours or on high for 6-8 hours, or until the chicken shreds easily. After removing the chicken from the slow cooker to shred it, transfer the sauce to a small saucepan and add the starch slurry, bringing to a boil to thicken. Then return everything to the slow cooker. Alternatively, you can add the starch slurry to the shredded chicken and sauce in the slow cooker and cook on high for an additional 30 minutes. It will thicken, but not quite as much.