This delicious dinner casserole is sure to be a hit at the family dinner table no matter the season. The recipe is super-easy to make, can work as a side dish or standalone meal – it goes particularly well with lamb shanks – and is packed with flavour, combining fluffy potatoes, smooth butter, tangy sour cream, salty bacon, tasty cheese and indulgent cream. And it only takes 20 minutes to cook in the oven.