Place Boneless Skinless Chicken Breast in a Crock Pot. Spread Pesto evenly as possible on all visible surfaces of the Chicken.
2Sprinkle the Dry Ranch Mix over Chicken. Pour the Chicken Broth over Chicken. Drop stick of Butter in the middle.
3Heat on Low for 6 – 8 hours or High for 3 – 4 hours.
Sprinkle with Mozzarella before serving.