GRIDDLED CHICKEN WITH GARLIC & CAPER BUTTER

100g Kerrygold Pure Irish Butter, softened • 1 garlic clove, crushed • 1 tbsp nonpareille capers, drained and roughly chopped • 1 small lemon, zested and halved • 1 tbsp finely chopped flat leaf parsley • 2 skinless British chicken breasts • 1 tsp olive oil • 450g pack carrot, swede and potato mash • 190g pack Tenderstem broccoli and fine beans