Add the potatoes, pesto, garlic, rosemary, salt and pepper to the Slowcooker
Add in 2 tsp of butter
Coat your chicken in a tsp of Cajun or paprika and pan fry for 1 min each side just to seal it
Add the chicken on top of the potatoes, sprinkle with Parmesan and cook on high for 3 hours
Serve up and sprinkle with more Parmesan