Boil the carrots for 20 mins until tender, then drain and return to the pan. Mash with the butter, Pernod and plenty of seasoning until fairly smooth and most of the moisture has evaporated. Tip in a bowl and cover. This will keep in the fridge for 2 days. On the day, heat in the microwave on High for 7 mins, or in the oven for 20 mins, until piping hot.